Manhunt in Boston after bombing suspect is killed

WATERTOWN, Mass. (AP) -- SWAT teams in armored vehicles took command of the tense and locked-down streets of Boston and its suburbs Friday in an all-out hunt for the surviving Boston Marathon bombing suspect after his older brother died in a desperate getaway attempt.

 Law enforcement officials and family members identified the suspects as 19-year-old Massachusetts college student Dzhokhar Tsarnaev, still at large, and Tamerlan Tsarnaev, 26, dead. The ethnic Chechen brothers from Russia lived near Boston and had been in the U.S. for about a decade, an uncle said.

 In a long night of violence that began Thursday evening, they shot and killed an MIT policeman, severely wounded another law enforcement officer, and hurled explosives at police during a gun battle and car chase that ended with the younger brother slipping through officers' fingers in a hail of bullets, authorities said.

This photo released Friday by the FBI shows a suspect that officials identified as Dzhokhar Tsarnaev, who is being sought by police in the Boston Marathon bombings. 

As the manhunt dragged on, the suspects' uncle in Maryland, Ruslan Tsarni, pleaded on television: "Dzhokhar, if you are alive, turn yourself in and ask for forgiveness."

 The search by thousands of law enforcement officers all but paralyzed the Boston area. Officials shut down all mass transit, including Amtrak trains to New York, advised businesses not to open, and warned close to 1 million people in the entire city and some of its suburbs to stay inside and unlock their doors only for uniformed police.

 "We believe this man to be a terrorist," Boston Police Commissioner Ed Davis said. "We believe this to be a man who's come here to kill people

The bloody turn in the case came just hours after the FBI released photos and video of two suspects in the bombing and asked for the public's help in identifying and catching them.

 Authorities said the man dubbed Suspect No. 1 - the one in sunglasses and a dark baseball cap in the surveillance-camera pictures - was Tamerlan Tsarnaev, while Suspect No. 2, the one in a white baseball cap worn backwards, was his brother.

Tamerlan Tsarnaev, who died in a shootout with police, had practiced martial arts and boxing, and even aspired to fight on the U.S. Olympic team.

The bombings on Monday near the Boston Marathon finish line killed three people and wounded more than 180, tearing off limbs in a spray of shrapnel and sparking fears across the nation that another terrorist attack had come to U.S. soil.

 Chechnya has been the scene of two wars between Russian forces and separatists since 1994, in which tens of thousands were killed in heavy Russian bombing. That spawned an Islamic insurgency that has carried out deadly bombings in Russia and the region, although not in the West.

But investigators have shed no light on the motive for the Boston Marathon bombing and said it was unclear whether it was the work of domestic or international terrorists or someone else entirely.

From Associated Press