An MIT police officer was shot and killed Thursday night. In addition, police were led on a chase into Watertown, where a gunfight and explosives were detonated.
12:58 p.m ET: Federal agents are interviewing the suspects’ sister in West New York, N.J, according to WABC-TV.
12:40 p.m. ET: “I don’t have a single American friend. I don’t understand them,” slain terror suspect Tamerlan Tsarnaev told a photographer who featured him on a website of boxing photos.
12:35 p.m. ET: Police warn Boston residents to expect a “controlled explosion” this afternoon out of an “abundance of caution.”
The City Quiet….no one on the streets
12:33 p.m. ET: “We all want to thank the members of the public who have respected our requests to stay indoors. We know what an inconvenience it is,” Mass. Gov. Deval Patrick said at a press conference.
12:12 p.m. ET: “I’m a stress free kind of guy,” suspect Dzhokhar Tsarnaev wrote on social media site Twitter on Wednesday, just two days after the bombing, ABC News has confirmed. Tsarnaev tweeted from the account @J_tsar.
“There are people that know the truth but stay silent & there are people that speak the truth but we don’t hear them cuz they’re the minority,” he tweeted on the day of the bombing.
Cryptically, he also tweeted the words “Boston Marathon” to a user whose account is locked.
12:00 p.m. ET: MIDDAY WRAP:
Boston and surrounding suburbs are on lockdown as a “massive manhunt” continues for “Suspect 2,” a man identified as Dzhokhar Tsarnaev, 19, and accused of carrying out a deadly bombing Monday at the Boston Marathon.
A second man, Tamerlan Tsarnaev, 26, initially identified by the FBI as “Suspect 1″ died early in a Boston hospital early this morning following a dramatic gunfight with police that began around midnight.
The men, brothers who are believed to have lived in the U.S. for several years, are ethnic Chechens. Their father lives in the restive Russian republic of Dagestan and his sons were born in Kyrgyzstan.
Police issued photographs of the two men Thursday, but their identities at the time were unknown. Late Thursday night, following a robbery and the ambush and alleged murder of MIT police officer Sean Collier, police pursued the men where they engaged in a firefight and threw grenades.
Tamerlan, a former amateur boxing champ, was killed. And Dzhokhar, a student at UMass Dartmouth, fled the scene and is being pursued by police. That manhunt continues.
Acquaintances who knew the men, but have not had recent contact, describe them as mild-mannered, friendly and assimilated.
Police have shut down all public transportation in the Boston area and asked residents to remain at home. Dzhokhar Tsarnaev is considered armed and dangerous and could potentially fight to the death if confronted.
11:23 a.m. ET: Boxing coach John Curran who trained Tamerlan Tsarnaev describes the slain bombing suspect as “nice guy” and “very good athlete.” Curran said Tamerlan was a regional amateur champion and had to the potential to go pro.
Curran’s comments are consistent with descriptions of both men by multiple former associates, who said there was little in their past behavior to indicate they would be suspected of terrorism.
11:07 a.m. ET: Increased police presence seen in Watertown, Mass., and outside suspect’s home in Cambridge, Mass. SWAT teams, bomb units, and heavily armed officers on the scene in both locations.
11:02 a.m. ET: President Obama was briefed on the manhunt by Attorney General Eric Holder and FBI Director Robert Mueller between 9:45 a.m and 10:45 a.m. this morning, say White House sources.
10:54 a.m ET: ABC News confirms the identity of “Suspect 1″ in the Boston Marathon bombing. Tamerlan Tsarnaev, 26, died from his wounds early this morning following a shootout with police. Police are currently pursuing a second suspect Dzhokhar Tsarnaev, 19, believed to be Tamerlan’s younger brother.
10:40 a.m ET: Slain MIT officer Sean Collier was killed in “ambush,” shot while sitting in parked car, law enforcement sources tell ABC News.
marathon bombing suspects early Friday morning, police said.
10:31 a.m. ET: A gray Honda believed to have been used by suspect Tamerlan Tsarnaev has been recovered in Boston.
10:25 a.m. ET: Students at UMass Dartmouth are being evacuated from their dorms, following confirmation that suspect Dzhokhar Tsarnaev, 19, lived in the Pinedale residence hall.
10:24 a.m. ET: Law enforcement officials confirm that suspect Dzhokhar Tsarnaev, 19, was born in Kyrgyzstan and is of Chechen ethnicity. His family lives in the restive Dagestan region of Russia.
10:13 a.m. ET: FBI posts electronic wanted posters, digital billboards throughout Boston area with information about suspect Dzhokhar Tsarnaev.
10: 11 a.m. ET: Connecticut State Police put out bulletin for vehicle suspect Dzhokhar Tsarnaev may be driving. The car is described as a gray Honda CRV with license plate: 316 ES9.
9:51 a.m. ET: Father of suspect Dzhokhar Tsarnaev tells 19-year-old to “Surrender peacefully. Give up, give in and come home.” In a conversation with the man, who lives in the restive Dagestan region of Russia, he told ABC News that if the Tsarnaev is killed “all hell will break loose.”
9:43 a.m ET: The MIT police officer killed in a shootout with bombing suspects Thursday night has been identified as Sean Collier, 26, of Somerville, Mass.
9:39 a.m. ET: Father of two Boston bombing suspects tells ABC News he spoke to one son yesterday to ask if they were safe following the incident. “Everything is good daddy, everything is very good,” one of the sons told his father, making no indication they were involved.
9:29 a.m. ET: People who went to school with high school with Dzhokhar Tsarnaev, 19, in Cambridge, Mass., describe bombing suspect to ABC News as “real cool” and “nice.”
8:49 a.m. ET: Heavily armed police appear to have descended on a location in Watertown, Mass.
8:37 a.m. ET: The Boston bombing suspects are believed to be brothers from Russia and of Chechen ethnicity, law enforcement authorities tell ABC News. At least one of the brothers is a legal permanent resident in the United States, according to sources.
The brothers are believed to have spent time in Kyrgyzstan.
8:23 a.m. ET: All taxi service has been suspended in Boston, police say.
8:19 a.m. ET: Dzhokhar Tsarnaev, 19, the suspect whom authorities continue to search for, is believed to have assault rifles and an assortment of other weapons, including bombs, law enforcement authorities tell ABC News. Police are concerned he might try to take hostages and is prepared to die in a confrontation with authorities.
8:03 a.m. ET: Police tell residents of Boston and surrounding suburbs to “shelter in place,” placing a major city essentially on lockdown.
8:00 a.m. ET: Gov. Deval Patrick tells residents of Boston and surrounding towns not to open door for anyone other than a uniformed police officer, as manhunt continues.
7:25 a.m. ET: Authorities identify Dzhokhar Tsarnaev, 19, as the surviving bombing suspect, whom they are looking form. Tsarnaev was initially called Suspect 2 by police.
7:20 a.m ET: Police shut down Cambridge, Mass., street and search home believed to be where suspect lives.
6:50 a.m. ET: The suspects are believed to be foreign nationals, living legally in the United States for at least two years, according to federal sources.
In a shootout with police, the suspects were throwing grenades. Based on the way they engaged police, authorities believe they have some paramilitary training.
At least one pressure cooker was found at the scene of the shootout, sources said.
6:35 a.m. ET: All Boston public schools are cancelled for the day.
6:30 a.m. ET: SWAT officers descend on Watertown, Mass., and surrounding areas. Boston-area universities are on lockdown and have cancelled classes.
6:20 a.m. ET: “We believe this is a terrorist. We believe this is a man who’s come here to kill people,” said Boston Police Commissioner Ed Davis, about Suspect 2, who remains at large.
6:06 a.m. ET: Harvard University is closed because of public safety concerns, according to its Twitter account.
5:58 a.m. ET: “We believe these are the same individuals that were responsible for the bombing on Monday at the Boston Marathon. We believe they’re responsible for the death of an MIT police officer and the shooting of an MBTA police officer. This is a very serious situation that we’re dealing with,” police said.
5:55 a.m. ET: ABC News has obtained footage of the gunfight that took place in Watertown early this morning. Police said “suspect number 1″ was killed in this shootout.
according to police. “Suspect 2,” in the white hat remains on the run from authorities.
5:45 a.m. ET: Subways and buses suspended until further notice in Boston, according to the Office of Constituent Engagement. Official said, “this situation is grave.” Residents asked to stay indoors.
5:36 a.m. ET: Patient believed to be Boston Marathon suspect at Beth Israel Hospital died from a combination of blast and gunshot wounds, a doctor said at a news conference. Doctors and hospital officials say they don’t have any information on the identity of deceased patient.
Early this morning one suspect in this week’s deadly Boston Marathon bombing was killed in a shootout with police in Watertown, Mass. Police said “suspect number 2″ is on the loose and is armed and dangerous. “Suspect 2″ is the target of an “active search by tactical teams,” police said.
Police also released a new image of “suspect number 2,” which they said was taken from a local 7-11 in Cambridge, Mass., Thursday night.
The Monday bombing near the finish line of the Boston Marathon killed three people and injured more than 170. Thursday evening the FBI released images of the two suspects in the case.