After Massive Manhunt, Police Apprehend Marathon Bombing Suspect


(We most recently updated this post at 8:52 p.m. ET. See this note about how we cover news such as this.)

Developing Now: SUSPECT IN CUSTODY: After a manhunt that locked down most of the Boston metropolitan area, police apprehended Dzhokhar Tsarnaev, whom the FBI had identified as suspect 2 in the deadly bombings at the Boston Marathon. The Boston Police Department made the announcement in a twitter message. CNN and other media outlets reported that when the suspect taken by police, there were cheers. Click here to go directly to the updates on the situation.)

Tamerlan Tsarnaev, one of the two young men suspected in the deadly bombings at the Boston Marathon was dead after a gun exchange early Friday with police in Watertown, Mass. Authorities said the other suspect, his brother Dzhokhar, was at large and were warning people in the area to stay inside as officers conducted a door-to-door search.

But by late afternoon, Gov. Deval Patrick lifted the lockdown and told residents they should feel free to go about their business, while remaining vigilant because “there is still a very dangerous person out there.”

“We believe this to be a terrorist,” Boston Police Commissioner Ed Davis said of the at-large suspect. “We believe this to be a person who’s come here to kill people.”

Col. Timothy Alben said police went door-to-door, up and down 20 streets in the town of Watertown, conducting “limited searches.” Police followed many leads, but none of them have been fruitful.

“We do not have apprehension … but we will have one,” said Alben.

The two suspects, authorities initially told NPR and other news outlets, were brothers from Chechnya. Later Friday, relatives said that while the family is originally from Chechnya, the brothers lived there only briefly. The family lived for many years in Kyrgyzstan, before coming to the U.S. in the past decade.

Mass transit service in the Boston area was suspended Friday morning. So was taxi service for the first few hours of the day. Drivers were being told to stay off the streets in Watertown. Businesses there were told not to open. Boston city officials asked residents to “please go home” and not congregate at bus stops or other places. Just after 8 a.m. ET, officials said the “shelter in place” advisory had been extended to the entire city of Boston.

The dramatic series of events began to unfold late Thursday, with a robbery at a convenience store in Cambridge, Mass., and the shooting death of a police officer on the campus of the Massachusetts Institute of Technology. Minutes later, officials say, an SUV was carjacked in Cambridge. At least one other police officer was shot and wounded early Friday.

That SUV was driven to Watertown. There, authorities say, the suspects threw explosives at police and exchanged gunfire. One of the two — known as “black hat” for the cap he was seen wearing at the marathon — was critically injured and later died. The other, “white hat,” fled the area and was being sought.

We’re following the story and updating as news comes in. There’s a timeline of the manhunt posted here; a story about the Boston lockdown is here; a profile of the suspects is here, and NPR’s coverage of the bombings and the search for the suspects is collected here.

Update at 8:47 p.m. ET. Suspect In Custody:

The Boston Police Department tweets:

“Suspect in custody. Officers sweeping the area. Stand by for further info.”

Update at 8:38 p.m. ET. ‘This Is Unbelievable’:

Talking to All Things Considered, Keith Glavish, who lives about five houses away from where police believe Dzhokhar is located, says he can hear a helicopter overhead and has occasionally heard “shots” that “sound like firecrackers.”

“The whole scene is totally surreal,” Glavish said. “I mean, this is a very, very quiet neighborhood. … I pinch myself to realize that this is actually unfolding, literally outside our door. We’ve been inside all day long, cooped up, and thinking, ‘Well, it’s on the other side of Watertown, we don’t really have to worry.’ I took the dog in the backyard a few times. But this is unbelievable.”

Meanwhile The Boston Globe tweets that one of its photographers can hear police talking to a person they believe is the suspect.

“We know you’re in there,” the Globe reports police are saying. “Come out on your own terms. Come out with your hands up.”

Update at 7:41 p.m. ET. FBI Had Previous Contact With Suspect:

As we wait for more information about what’s happening at a boat in Watertown, we have more news on the investigation: NPR’s Dina Temple-Raston reports that an FBI source tells her that “the agency interviewed the older brother Tamerlan in 2011 at the request of a foreign government.”

At the end of the investigation, they didn’t “find anything that was enough to allow them to hold onto him.”

Tamerlan’s mother told Russia Today, a news organization funded by the Russian government, that her children had been followed by the FBI “for years.” RT reports:

“Her biggest suspicion surrounding the case was the constant FBI surveillance she said her family was subjected to over the years. She is surprised that having been so stringent with the entire family, the FBI had no idea the sons were supposedly planning a terrorist act.”

Update at 7:31 p.m. ET. Police Believe They’ve Located Suspect:

An FBI source tells NPR’s Dina Temple-Raston that police have located the suspect.

She tells us:

“Officers are proceeding with caution as an official fears the suspect may have booby-trapped the scene.

“FBI is waiting for a tactical team and bomb technician.

“FBI is behaving as if the suspect is still alive.”

The Boston Globe tweets:

“Marathon bombings suspect believed to be inside boat in back yard of Watertown home. The boat was surrounded by police.”

Update at 7:25 p.m. ET. Obama Speaks With Putin:

President Obama spoke to Russian President Vladamir Putin today. Putin, the White House said, expressed his condolences on behalf of the Russian people.

“President Obama thanked President Putin for those sentiments, and praised the close cooperation that the United States has received from Russia on counter-terrorism, including in the wake of the Boston attack,” the White House said in a statement. “The two leaders agreed to continue our cooperation on counter-terrorism and security issues going forward.”

Update at 7:05 p.m. ET. Residents Asked To Shelter In Place:

Multiple news organizations are reporting major police activity in Watertown. Boston Police Department tweeted:

“Police operations in the Franklin Street Watertown area. Residents shelter in place.”

Update at 6:28 p.m. ET. ‘Stop Any Further Violence’:

Col. Timothy Alben asked Dzhokhar to “stop any further violence toward anyone,” and turn himself in.

Alben said Dzhokhar escaped on foot, because police did not have enough police to create a perimeter. But Alben said he believes the fugitive is still in Massachusetts.

Update at 6:09 p.m. ET. Stay-Indoors Order Lifted; No Apprehension:

During a news briefing in Watertown, Massachusetts, a short time ago, authorities said the “stay-indoors request” has been lifted, but that no suspect has been arrested.

Gov. Deval Patrick said that while people should feel free to go about their business, they should “remain vigilant” because “there is still a very dangerous person out there.”

Col. Timothy Alben said police went up and down 20 streets, “door to door” conducting “limited searches.” Police followed many leads, but none of them have been fruitful.

“We do not have apprehension … but we will have one,” said Alben.

Update at 5:39 p.m. ET. A Timeline:

We’ve already given you a timeline of events. But it’s worth recapping. Here is a revised one via the Massachusetts State Police:

“2224 MIT Police get calls for what sounds like shots

“2228 Armed Robbery of 7-11 750 Mass Ave (not bombers)

“2229 MIT Officer found shot, request for ALS from Cambridge

“2231 Call comes in for car-jacking that took place at 816 Memorial Drive

“Some time later: MBTA police spots car and pursuit ends in Watertown”

Update at 5:15 p.m. ET. Homemade Explosives:

A Massachusetts State Police spokesman Dave Procopio says police have recovered “numerous pieces of evidence” in Watertown, including “homemade explosives… pipe bombs and another pressure cooker, as well as more than 200 spent rounds.”

Update at 5:09 p.m. ET. Suspects Did Not Rob Convenience Store:

WBUR quotes a Massachusetts State Police spokesperson saying the two suspects in the Boston Marathon bombing case did not rob a convenience store last night.

“The bombers did purchase gas at a gas station in Cambridge later in the chain of events and we recovered images of them there,” State Police spokesperson Dave Procopio told WBUR.

We’re also awaiting a news conference, scheduled for 5:30 p.m. ET.

Update at 4:36 p.m. ET. The Opposite Of Terrorist:

NBC News spoke to John Curran, who coached Tamerlan when he was a boxer. It is yet another person completely stunned that Tamerlan would be suspected in the Boston Marathon bombings.

Tamerlan was “athletic, outgoing, nice guy, very respectful, just the opposite of what you paint as a terrorist,” Curan told NBC News.

Update at 4:07 p.m. ET. ‘Most Popular Kid In High School’:

WBUR spoke to Adhi Moro who was friends with both brothers. He gave a little more detail on Tamerlan, the older brother who was killed this morning.

WBUR bulleted highlights from the interview:

  • Dzhokhar was “the most popular kid in high school”
  • Tamerlan was a strong and intimidating guy
  • Their dad owned a garage where they worked
  • They didn’t really talk about Chechnya or their heritage
  • Tamerlan declined to go pro as a boxer
  • Girls loved Dzhokhar in school, but he wasn’t too interested
  • It’s less surprising that Tamerlan is accused of these crimes
  • Their family used to rent a house in Cambridge from a nice older lady
  • Tamerlan seems to have been a big influence on Dzhokhar

Update at 3:29 p.m. ET. Red Sox, Bruins Postpone Games:

The Red Sox and Bruins have cancelled their games in Boston tonight.

The Sox tweeted they were postponing their game to “support efforts of law enforcement officers.”

Update at 3:21 p.m. ET. No Longer Seeking Honda:

The FBI’s Boston office tweets:

“No longer seeking 1999 Honda Civic. Tips to: . #FBI #BostonMarathon

Update at 2:59 p.m. ET. Dzhokhar’s Twitter Account?

A classmate of Dzhokhar tells NPR’s Andy Carvin that the twitter account @J_Tsar was indeed his. Another classmate tells Buzzfeed the same thing.

Here’s what that account tells us, according to NPR’s Social Media desk:

— He has been active since the bombing, last tweet on Wednesday

— He tweeted “aint no love in the heart of the city, stay safe people” on the day of the bombing

— He tweets about Chechnya and being proud to be from there

— He tweeted lots of music lyrics – Eminem, Peter Frampton, Michael Jackson, Paul McCartney

— He may have been a 9/11 truther, based on tweets

Dzhokhar also appeared to have an Amazon Wish List. Among the items on it, books on how to forge driver’s licenses and books about Chechen history.

Update at 2:22 p.m. ET. ‘A Setup’:

Radio Liberty, an overseas news service funded by the United States, spoke to Anzor Tsarnaeov, whom they and the AP identified as the suspects’ father.

According to an English translation by Sergei Sotnikov, a producer at NPR’s Moscow bureau, the father said he could not imagine his sons doing such a thing.

“Knowing our children — you see we know our children — if a person didn’t pray how he can go and blow up or something… I don’t know. I have never seen either explosives… nothing,” Tsarnaeov said. Later in the interview he said this was a “setup.”

This is very much in line with what the suspects’ aunt, Maret Tsarnaev, told NPR’s Joe Shapiro.

“This totally doesn’t make sense to me,” she said, adding that authorities had not released definitive proof that these were the people responsible for the Boston blasts.

“Tamerlan and Dzhokhar never were extremists,” Tsarnaeve said. “Never had enemies. Never had any — of course everybody has opinion on every issue. But does mean that you live with it, and you would go for a heinous ugly act? Like happened on that marathon street in Boston. And again, all I can see these two boys are walking on the street.”

Update at 2:15 p.m. ET. FBI IDs Another Car:

FBI Boston just tweeted:

“Bombing suspect may be driving 4-door, ’99, green Honda Civic w/ Mass. plates reading: 116GC7. #FBI#BostonMarathon

This the latest communique from police. The previous one came a little before 1 p.m., when Massachusetts State Police said they would conduct a “controlled explosion.” The Times adds:

The State Police said the controlled explosion would take place to ensure the safety of the law enforcement officers at the scene.

Update at 1:48 p.m. ET. MIT Officer’s Family “Heartbroken”:

The family of the slain MIT officer tells The Boston Globe that they are “heartbroken” at the loss of Sean Collier.

“Our only solace is that Sean died bravely doing what he committed his life to – serving and protecting others,” the family statement read, according to the Globe. “We are thankful for the outpouring of support and condolences offered by so many people. We are grieving his loss and ask that the media respect our privacy at this time.”

Update at 1:10 p.m. ET. Tamerlan Tsarnaev “Was Not Close” To Making U.S. Boxing Team:

A photo gallery about Tamerlan Tsarnaev says he thought he could some day be selected to box for the U.S. in the Olympics. But, “he was not close to making an Olympic team or national team,” USA Boxing spokeswoman Julie Goldsticker says in a statement forwarded to us by NPR’s Howard Berkes. She adds that “as a non-citizen, he would have been precluded from competing in any qualifying tournaments or USA Boxing national events. In addition, he lost his first bout in the only national tournament he competed in, which was the 2009 Golden Gloves.”

Update at 12:40 p.m. ET. Search Is “Progressing”:

Police have now searched “well over 60 or 70 percent of want we want to cover” in Watertown, Col. Timothy P. Alben, superintendent of the Massachusetts State Police, just said to reporters.

He also said there will be a “controlled explosion” later this afternoon on Norfolk Street in Cambridge — presumably at or near a home where at least one of the suspects lived.

Update at 12:35 p.m. ET. Stay Indoors, Governor Says:

“The stay indoors request continues,” Gov. Deval Patrick (D) just told reporters.

Update at 12:30 p.m. ET. About The Suspects And The Family.

Maret Tsarnaev, an aunt of the suspects who lives in Toronto, tells NPR’s Joseph Shapiro that:

— While the family is Chechnyan, it lived in Chechnya for just one year, in 1994. Like many Chechnyans, members of the family were forced to flee during World War II and spent decades in Kyrgyzstan.

— Tamerlan Tsarnaev, the older suspect who was died early Friday, became a more devout Muslim in recent years. But she does not believe he carried a hatred toward other religions and says he fathered a child by a Christian woman.

NPR’s Liz Halloran reports that:

— Dzhokhar Tsarnaev graduated from Cambridge Rindge and Latin School, where in 2011 his wrestling prowess earned him a citation as one of the “Greater Boston League Winter All Stars.” A former teacher at the school described him to The Boston Globe as having a “heart of gold.”

On Vkontakte — described as the Russian equivalent of Facebook — he lists his personal priority as “Career and money,” and his world view as “Islam.”

— Tamerlan Tsarnaev was a boxer and participated in a 2009 New England Golden Gloves tournament, where he was described as being from Lowell, Mass. The Lowell Sun newspaper reported that he won his first fight in 2004, and was quoted as saying: “I like the USA. America has a lot of jobs. That’s something Russia doesn’t have.”

Update at 11:45 a.m. ET. “He Put A Shame!” On Family And Chechens, Uncle Says.

Calling them “losers” and saying that the suspects had “put a shame!” on their family and all Chechens, a man identified as an uncle of the Tsarnaev brothers just gave reporters in Boston an emotional statement. And Ruslan Tsarni appealed to suspect Dzhokhar Tsarnaev to turn himself in.

Update at 11:28 a.m. ET. Suspect Not At Latest Scene:

A police spokesman just told reporters that authorities do not believe Dzhokhar Tsarnaev is at the latest location where a tip brought heavily armed officers to the scene in Watertown.

Update at 11:15 a.m. ET. UMass Campus In Dartmouth Being Evacuated:

UMass Dartmouth is closed and is in the process of a controlled evacuation of the campus. Students, staff and faculty have been asked to leave campus in a calm and orderly fashion. This action is in response to information that the person being sought in connection with the Boston Marathon bombing is a registered student. State, local, and campus police are on campus to assist with the evacuation and to conduct a full investigation.” The school is located 60 miles south of Boston, near New Bedford, Mass.

Update at 11:12 a.m. ET. Scene May Involve Possible Accomplice, Not The Suspect:

CNN reports it has been told by law enforcement sources that the latest area of Watertown where police have brought in heavy forces and have asked the media to move back is where a possible accomplice of the suspects is located — not fugitive Dzhokhar Tsarnaev.

Update at 11:07 a.m. ET. Father Says Fugitive Son Is “A True Angel”:

Reached by telephone in the Russian city of Makhachkala, Anzor Tsarnaev has told The Associated Press that his younger son, Dzhokhar, is “a true angel.”

“He is such an intelligent boy. We expected him to come on holidays here,” the father also said.

Update at 11:05 a.m. ET. Taxi Service Restored In City:

Earlier Friday, officials told taxis to stay off the streets of Boston. Boston Police now say taxi service has been restored.

Update at 10:47 a.m. ET. Another Ramping Up Of Police Activity In Watertown:

Reporters have been told for at least the second time today to move back from a neighborhood in Watertown. TV images show that police have their weapons drawn.

Update at 10:42 a.m. ET. Vehicle Found, It Was Unoccupied:

Boston police follow up with this message: “UPDATE: Vehicle (MA Plate: 316-ES9) found unoccupied. Car being processed for evidence by authorities.”

Update at 10:30 a.m. ET. Police Are Looking For A Honda CRV With Massachusetts Plates.

Boston Police just posted this message on Twitter:

#WANTED: Police seeking MA Plate: 316-ES9, ’99 Honda CRV, Color – Gray. Possible suspect car. Do not approach.”

Update at 10:20 a.m. ET. How Did “A Beautiful, Beautiful Boy” Get Involved?

“It’s stunning,” WBUR host Robin Young says of hearing that 19-year-old Dzhokhar Tsarnaev is the fugitive who’s suspected of being one of the young men who planted the bombs at the Boston Marathon and now of being involved in deadly gun battles with police. “I had the prom party for that class in my back yard,” she says of Cambridge Rindge & Latin High School students, who included Tsarnaev and Young’s nephew Zolan.

The fugitive, she says, was “the light of the party … a beautiful, beautiful boy.” But when she saw the photo released early Friday of a suspect robbing a convenience story, she could tell it was him. Young’s family has known Dzhokhar Tsarnaev since he was a young high school student and she saw “no sign of this … no sign.”

Update at 9:55 a.m. ET. “I’m Shocked,” Says Friend Of Fugitive:

If anyone says that 19-year-old Dzhokhar Tsarnaev’s “character, attitude … or activities that he did daily” would have indicated he was likely to bomb the marathon or engage in shootouts with police, “they’re absolutely lying,” says a friend of the fugitive. Zolan Young, nephew of WBUR’s Robin Young, spoke with Morning Edition moments ago. He’s known Dzhokhar Tsarnaev since they were both in high school.

“I can’t emphasize how much a courteous guy he was,” Zolan Young said. “This was someone that I could always count on.” The last time Young heard from Tsarnaev was during this year’s Super Bowl, when Tsarnaev texted him to ask if Young was having a party.

“I’m shocked,” said Zolan Young. “This is one of my friends.”

Update at 9:40 a.m. ET. Who Are These Brothers? Some Clues On Social Media:

As people search for information about the suspects, they’re coming on some interesting material on social media sites. Bear in mind: It will be hours, if not days, before material on such sites can be verified. One that’s getting particular attention: This photo gallery of a young man identified as Tamerlan Tsarnaev, the suspect who died after a gun fight with police. This caption is under one photo: “Originally from Chechnya, but living in the United States since five years, Tamerlan says: ‘I don’t have a single American friend, I don’t understand them.’ ” There’s a page reported to be about Djohar Tsarnaev here (we’re seeing his named spelled as “Dzhokhar” in other places).

Update at 9:15 a.m. ET. Suspects’ Uncle Says “They Do Not Deserve To Live On This Earth”:

WBZ-TV has spoken with Ruslan Tsarni, identified as the suspects’ uncle, who says of his nephew Tamerlan’s death, “he deserved his.” Tsarni added that “they do not deserve to live on this earth.”

According to the uncle, the young men were born in Kyrgyzstan.

Update at 9 a.m. ET. Suspect May Not Want To Be Taken Alive:

A law enforcement source of NPR’s Carrie Johnson tells her that his agency increasingly believes that Dzhokhar Tsarnaev, the suspect who police are searching for, is acting in a way that indicates he does not want to be taken alive.

Update at 8:44 a.m. ET. Reports That Police Are Using Loudspeakers To Tell Someone To “Come Out”:

There’s a heavy concentration of police activity now in one part of Watertown (all the news networks are broadcasting live from the scene). Reporters at the scene say they’ve heard police use loudspeakers to tell someone to come out of a building. News crews have been told by police to move back from the area. A local Fox News cameraman reports hearing police use a loudspeaker to say, “Give yourself up, come out, come out.”

Update at 8:30 a.m. ET. Suspect Had “Multiple Traumatic Injuries”:

When he heard gunshots and explosions overnight, Dr. David Schoenfeld of Beth Israel Hospital tells Morning Edition, he went to the hospital. Soon after, an injured man — the bombing suspect now identified as 26-year-old Tamerlan Tsarnaev, was brought in. He had “multiple traumatic injuries,” Schoenfeld says, from “bullet wounds or shrapnel.” Doctors worked to keep him alive, but it was quickly apparent that their efforts would not be successful.

Update at 8:25 a.m. ET. Fugitive Drove Toward Police, Made Escape:

The suspect who authorities are searching for apparently made his escape by driving the stolen SUV straight at police and forcing his way through, NPR’s Tom Gjelten reported on Morning Edition.

Update at 8:02 a.m. ET. Entire City Told To “Shelter In Place”:

The “shelter-in-place” advisory has been extended to the entire city of Boston as well as such suburbs as Watertown and nearby communities, Boston Police Chief Ed Davis just told reporters. There are about 4.5 million people in the Boston metropolitan area.

Update at 7:56 a.m. ET. Buses Being Used To Bring More Police Officers To Scene:

With mass transit in and around Boston shut down while the search for the suspect continues, NPR’s Jeff Brady reports from Watertown that buses are being used to bring more police officers to help in the manhunt.

Update at 7:55 a.m. ET. Officials Name Dead Suspect:

NPR’s Dina Temple-Raston tells Morning Edition that National Security Council officials say the dead suspect was Tamerlan Tsarnaev, who as we reported earlier is said to be the older brother of the young man who is still on the run. Authorities say the brothers are from Chechnya.

Update at 7:45 a.m. ET. Dead Suspect Reported To Be Older Brother:

The New York Times says the suspect who was killed is 26-year-old Tamerlan Tsarnaev. NPR has not independently confirmed that name.

Update at 7:30 a.m. ET. Arrest Of Third Person:

A third man, who authorities believe was an accomplice of the bombing suspects, has been arrested according to NPR’s Dina Temple-Raston. He may be the man, seen in videos earlier Friday, who police ordered to strip naked and was then put in the back of a patrol car.

Update at 7:15 a.m. ET. Nearly 400,000 People Staying Inside:

The scope of Friday’s events is captured in this information from NBC News:

“Roughly 381,000 people are sheltering in place as ordered by police in Massachusetts.”

Update at 6:59 a.m. ET. Reports On Suspects’ Identities:

The Associated Press and NBC News minutes ago reported being told by sources that authorities think they have determined the identities of the two bombing suspects, and that they are brothers. NPR’s Dina Temple-Raston checked with her law enforcement sources as well and is being told that the suspects are from Chechnya and that the suspect who is on the loose is 19-year-old Dzhokhar A. Tsarnaev.

Update at 6:35 a.m. ET. “Please Go Home,” City Asks Residents:

“With MBTA suspended, please do not congregate at stations and bus stops. Please go home,” the city of Boston says on its official Twitter page.

Update at 6:20 a.m. ET. Recapping The News.

WBUR, which is live blogging, sums up what’s happened in the past 12 hours or so this way:

– After 10 p.m. last night, a robbery took place at a [convenience store] in Cambridge [Note at 12:10 p.m. ET: earlier, WBUR reported that the robbery was at a 7-Eleven; the company says that is incorrect.]
– After that, an MIT police officer was fatally shot, allegedly by the two marathon suspects
– There was a carjacking in Cambridge involving the two suspects taking a Mercedes SUV
– The car was discovered by police in Watertown, which led to an exchange of gunfire
– During the chase, explosive devices were reportedly thrown from the suspects’ car
– During the exchange, one suspect was killed
– Also during the exchange of gunfire, an MBTA officer was shot and is in critical condition
– The second suspect fled and is at-large
– There’s an active search for the suspect who fled, the FBI’s bombing “white hat suspect”

Update at 6:05 a.m. ET. Watertown, Surrounding Area Shut Down; Mass Transit Closed:

Police have locked down several neighborhoods in Boston and its western suburbs — Watertown, Newton, Waltham, Belmont, Cambridge and the Allston-Brighton neighborhoods of Boston to stay indoors. All mass transit was shut down.

Classes at MIT and Harvard have also been cancelled for Friday, the universities announced.

Update at 5:05 a.m. ET. Boston Police Commissioner’s Statement On Death Of Suspect.

The Boston Police Department has put this message on its Twitter page: “Per Commissioner Davis: One suspect deceased, 2nd suspect (white hat) at large & considered armed & dangerous.”

Update at 4:45 a.m. ET. “Black Hat” Is Dead, Officials Say:

The bombing suspect known as “black hat” for the color of the cap he was seen wearing at the marathon was killed in the exchange of gunfire with police in Watertown, sources with knowledge of the events tell NPR’s Dina Temple-Raston.

Update at 4:35 a.m. ET. Prosecutor’s Account Of The Events.

“From the Middlesex County DA’s Office:

“Police are investigating a fatal shooting of MIT campus police officer by two men who then committed an armed carjacking in Cambridge, Middlesex Acting District Attorney Michael Pelgro, Cambridge Police Commissioner Robert Haas, and MIT Police Chief John DiFava announced this evening.

“At approximately 10:20 p.m. April 18, police received reports of shots fired on the MIT campus. At 10:30 p.m., an MIT campus police officer was found shot in his vehicle in the area of Vassar and Main streets. According to authorities, the officer was found evidencing multiple gunshot wounds.

“He was transported to Massachusetts General Hospital and pronounced deceased.

“Authorities launched an immediate investigation into the circumstances of the shooting. The investigation determined that two males were involved in this shooting.

“A short time later, police received reports of an armed carjacking by two males in the area of Third Street in Cambridge. The victim was carjacked at gunpoint by two males and was kept in the car with the suspects for approximately a half hour. The victim was released at a gas station on Memorial Drive in Cambridge. He was not injured.

“Police immediately began a search for the vehicle and were in pursuit of the vehicle into Watertown.

“At that time, explosive devices were reportedly thrown from car by the suspects. The suspects and police also exchanged gunfire in the area of Dexter and Laurel streets. During this pursuit, an MBTA Police officer was seriously injured and transported to the hospital.

“During the pursuit, one suspect was critically injured and transported to the hospital where he was pronounced deceased. An extensive manhunt is ongoing in the Watertown area for the second suspect, who is believed to be armed and dangerous.”

Update at 4:20 a.m. ET. Authorities Say 1 Suspect Is Dead, Other Is At Large:

Col. Timothy P. Alben, superintendent of the Massachusetts State Police, just told reporters that after the shooting at MIT, an SUV was hijacked in Cambridge, Mass. Police in Watertown pursued the vehicle. Explosives were thrown from that SUV and shots were exchanged.

The district attorney in Middlesex County, Mass., has released a statement saying that “one suspect was critically injured and transported to the hospital where he was pronounced deceased.”

The other suspect is said to be at large and authorities have released a photo of him. The state police say he resembles “suspect No. 2” in the bombings.

Update at 4 a.m. ET. Too Soon To Say For Sure If There’s A Connection:

A source with knowledge of the situation tells NPR’s Dina Temple-Raston that the situation is fluid and that it’s too soon to say for certain whether or not the individuals involved in the events that began at MIT and have extended into Watertown are related to the marathon bombings.

Update at 3:55 a.m. ET. Residents Warned To Stay Inside; Door-To-Door Search Expected.

The Massachusetts State Police have posted these messages on Twitter:

— “Residents in and around Watertown should stay in their residences. Do NOT answer door unless it is an identified police officer.”

— “If any concerns about someone at door, call 911 immediately. Repeat–Do not answer door, stay away from windows, keep doors locked.”

— “Police will be going door by door, street by street, in and around Watertown. Police will be clearly identified. It is a fluid situation.”

Update at 3:50 a.m. ET. From The Associated Press:

“The chaos in Watertown, about 10 miles west of Boston, occurred just hours after a Massachusetts Institute of Technology police officer was shot and killed on campus. It was unclear if the outbursts of violence were related. …

“The officer had been responding to report of a disturbance Thursday night when he was shot multiple times, according to a statement from the Middlesex district attorney’s office and Cambridge police. It said there were no other victims.

“Meanwhile, in Watertown, witnesses reported hearing multiple gunshots and explosions at about 1 a.m. Friday. Dozens of police officers and FBI agents were in the neighborhood and a helicopter circled overhead.”

Note: As happens when stories such as this are developing, there will likely be reports that turn out to be mistaken. Wednesday, for example, there were reports from CNN, the AP, WBUR and others that authorities either had arrested a suspect or were about to do that. It turned out that no one had been arrested or taken into custody. We will focus on news being reported by NPR, other news outlets with expertise, and statements from authorities who are in a position to know what’s going on. And if some of that information turns out to be wrong, we’ll update.

Take me back to the top of this post.

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