Police: Boston Marathon bomb suspect fired shots from boat, hospitalized in serious condition

A light beam from a helicopter, top right, aims in the direction of Watertown, Mass., where officials searched for a suspect in the Boston Marathon explosions, Friday, April 19, 2013, in Boston. Officials claim the suspect has hunkered down inside a boat in the yard of a home on Franklin Street. Two suspects in the Boston Marathon bombing killed an MIT police officer, injured a transit officer in a firefight and threw explosive devices at police during their getaway attempt in a long night of violence that left one of them dead. AP