BOSTON MARATHON

Manhunt for Second Bomber

Other suspect, his brother, killed in shootout.

The Associated Press has just announced, via Twitter, that the surviving Boston bombing suspect has been identified as Dzhokhar A. Tsarnaev, a 19-year-old from Cambridge, Massachusetts. He is on the loose and believed to be extremely dangerous. NBC’s Pete Williams reports that the other suspect, believed to be Tsarnaev’s Russian-born, 26-year-old brother, Tamerlan Tzarnaev, was gunned down during a shootout with police in Watertown early Friday morning. The brothers are reportedly both legal, permanent residents of the United States. They are thought to be from a Russian region near Chechnya and have been in the United States for at least one year. Police have reportedly arrested a third man, not a suspect, and have him in custody at the Tzarnaev brothers' Norfolk Street home.