A manhunt is underway for one of two suspects in Monday's marathone bombing.
Police have identified the suspect as 19 year-old Dzokar Tsarnaez of Cambridge, Massachusetts.
Authorities say Tsarnaev, and his brother Tamerlan Tzarnaev, 26, planted the two bombings that killed three and injured 176.
Tamerlan Tzarnaev was killed late Thursday in a shootout with police in the town of Watertown, Massachusetts.
Dzokar Tsarnaezv is described by authorities as light skinned with brown, curly hair and wearing a gray hoodie.
They say he is likely armed and is considered very dangerous, both are of Chechen origin and in the U.S. legally.