(FOX NEWS) BREAKING NEWS: One of two suspects in the Boston Marathon bombing is dead, the other on the loose and large parts of the city are on virtual lockdown after a chaotic night of mayhem that included the murder of a Massachusetts Institute of Technology police officer and a shootout with police, authorities said early Friday.
Police believe the two men, believed to be the suspects from Monday's terror attack, are brothers, possibly from Chechnya or Turkey, according to sources who spoke to Fox News. The man on the loose was identified as Dzhokhar A. Tsarnaev, 19, of Cambridge, Mass. They are believed to have been here for 'several years,' sources said.
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Schools are closed, train and bus service is suspended and police were telling residents of neighborhoods including Cambridge, Waltham, Watertown, Newton, Arlington and Belmont to stay indoors. Police have formed a wide perimeter and believe the suspect is on foot, armed and dangerous, inside.