WATERTOWN, Mass. —
The two suspects in the Boston Marathon bombing killed an MIT police officer and hurled explosives at police in a car chase and gun battle overnight that left one of them dead and his brother on the loose, authorities said Friday as thousands of officers swarmed the streets in a manhunt that all but paralyzed the Boston area.
The suspects were identified by law enforcement officials and a family member as Dzhokhar and Tamerlan Tsarnaev, brothers from a Russian region near Chechnya, which has been plagued by an Islamic insurgency that has carried out deadly bombings. They lived near Boston and had been in the U.S. for about a decade, an uncle said.
Tamerlan Tsarnaev, a 26-year-old who had been known to the FBI as Suspect No. 1 and was seen in surveillance footage in a black baseball cap, was killed overnight, officials said. His 19-year-old brother — dubbed Suspect No. 2 and seen wearing a white, backward baseball cap in the images from Monday's deadly bombing at the marathon finish line — escaped.
The law enforcement officials spoke on condition of anonymity because of the sensitivity of the unfolding case.
Authorities in Boston suspended all mass transit and warned close to 1 million people in the entire city and some of its suburbs to stay indoors as the hunt went on. Businesses were asked not to open. People waiting at bus and subway stops were told to go home.
From Watertown to Cambridge, police surrounded various buildings as they searched for Suspect No. 2. Around 8:30 a.m., officers sprinted toward a house in Watertown, and reporters were pushed back more than a block as helicopters buzzed overhead. SWAT teams, FBI agents and armored vehicles assembled at the scene as sharpshooters across the street trained their guns at the house.
"We believe this man to be a terrorist," said Boston Police Commissioner Ed Davis. "We believe this to be a man who's come here to kill people."