60-70% of Watertown has been covered, but the suspect has not yet been apprehended.

rtxys2p.si17:43 GMT: There will be a controlled explosion in Cambridge, Massachusetts, out of an “abundance of caution.”

17:42 GMT: Massachusetts state police say “no apprehension has been made” in search for bombing suspect. State police’s Timothy Alben says “60-70% of Watertown has been covered door-to-door, but the hunted suspect has not yet been apprehended.”

17:40 GMT: Boston Mayor Thomas Menino “We are city that is not going to let a terrorist take over.”

17:21 GMT: Dzhokhar Tsarnaev, 19, became an American Citizen on Sept. 11, 2012, CBS reported.

17:20 GMT: The suspects’ sister, 22-year-old Ailina Tsarnaev, told News 12 that she can’t comprehend what happened. “They were great people. I never would have expected it,”said the woman. “They are smart – I don’t know what’s gotten into them.”

16:56 GMT: John Kerry says, “It’s fair to say that for this entire week we’ve been in a pretty direct confrontation with evil.”

16:42 GMT: The suspects’ uncle, Ruslan Tsarni, says he has not seen the suspects in years and is “ashamed.” He has urged the suspect-at-large to turn himself in and ask for forgiveness. He said that he wants to meet the victims of the bombing.

16:28 GMT: The suspects’ father, Anzor Tsarnaev, told the BBC that his younger son Dzhokhar hoped to become a brain surgeon, and that he believed the secret services had framed his sons.

16:12 GMT: US Secretary of State John Kerry said, “We are part of the way there in bringing the Boston terror suspects to justice.”

16:09 GMT: FBI is looking for third suspect in Boston Marathon bombing, NBC reports.

16:01 GMT: Boston Mayor Tom Menino is on his way to the scene of police activity in Watertown, WBZ-Boston reports.

15:58 GMT: A Russian interpreter has been sent to the scene in Watertown, Massachusetts, CNN reported.

15:40 GMT: Boston’s Logan Airport tweets, “flights are arriving and departing. Taxis are available, but in very high demand.”

15:30 GMT: A Connecticut State Police spokesman says the vehicle in question has been located in the Boston area. The car was registered to the older brother, Tamerlan Tsarnaev.

15:28 GMT: The father of the suspected Boston Marathon bomber has called on his son to give up peacefully, but warned the US that if his son is killed “all hell will break loose,” ABC reported.

15:22 GMT: Police are seeking a “1999 Honda CRV with Massachusetts plate: 316-ES9. Color – Gray. Possible suspect car. Do not approach.”

15:20 GMT: Connecticut State Police says it is seeking a vehicle that could be occupied by a person possibly linked to the Boston bombing.

15:18 GMT: President Obama is currently being briefed on the situation in Massachusetts. Vice President Biden, AG Holder, and FBI’s Mueller are also getting briefed. According to the White House, Obama’s briefing is taking place in the situation room.

15:06 GMT: MIT has released the name of a campus officer shot dead last night by the suspects as he sat in his car. The man has been identified as 26-year-old Sean Collier. MIT Chief John DiFava says Collier was a dedicated officer, liked by his colleagues and the MIT community, AP reported.

14:00 GMT: Two unidentified people were taken into custody at the Cambridge, Mass., home where Dzhokhar Tsarnaev and his older brother Tamerlan grew up, but they were not being described as additional suspects. Three dozen FBI agents were surrounding the house, NBC reported.

13:52 GMT: Russia is ready to help US authorities in the investigation, the Russian embassy in Washington said on its Twitter account.

13:30 GMT: “I can’t believe this, it’s not possible. My nephews can’t do this. I don’t believe any of my nephews involved in this horrible incident,” Alvi Tsarni, who says he is the suspects’ uncle, told WBZ CBS news.

13:29 GMT: Transit police officers told the Boston Globe that their colleague who was shot is “going to live” and is “a good, brave dude.”

13:14 GMT: The press secretary of the head of Russia’s Republic of Chechnya has stated that the Tsarnaev brothers have had no connections with Chechnya for many years.

“The persons in question haven’t lived in Chechnya in their mature years and if they became ‘bad guys’ it’s the responsibility of those who raised them,” Alvin Karimov is cited as saying by Interfax.

13:12 GMT: An uncle of the brothers told AP that the men lived together near Boston and have been in the United States for about a decade.

13:05 GMT: Boston Marathon bombing suspect (Dzhokhar Tsarnaev) is accomplished medical student and ‘a true angel’, AP quoted father of suspect as saying.

13:03 GMT: Cambridge police report on two possible suspicious packages found on Center Street and Albany Street in Cambridge, Mass.

12:57 GMT: Police took two people into custody at house on Norfolk St, Watertown. FBI agents secured the area around the house, NBC News reported.

12:49 GMT: Russia’s President Vladimir Putin said the Boston Marathon bombings are a “disgusting” crime and offered assistance in the US investigation.

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