Police Hunt Second Boston Marathon Suspect, First Suspect Dead

Reports by Patch Staff

Officials confirmed early Friday morning that they are searching for the second Boston Marathon bombing suspect in Watertown following a chaotic night that left the first suspect dead.

The Associated Press is reporting the surviving Boston bomb suspect is identified as Dzhokhar A. Tsarnaev, 19, of Cambridge.

"We believe this man to be a terrorist," Boston Police Commissioner Ed Davis said at a post-4 a.m. press conference about the at large suspect. "We believe this to be a man who's come here to kill people. We need to get him in custody."

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An MBTA Transit Police Officer was shot during the overnight manhunt through Cambridge and Watertown.Richard (Dic) H. Donohue Jr., 33, is in surgery now at Mt. Auburn Hospital, according to a police spokesman just after 8 a.m. Donohue has been an MBTA police officer for three years.Donohue is from Winchester and now lives with his wife and six month old son in Woburn.

All MBTA service has been suspended on Friday morning and law enforcement officials are asking residents of Watertown, Newton, Waltham, Belmont, Cambridge and the Allston-Brighton neighborhoods of Boston to stay indoors and for businesses to not open today. 

Also, no vehicle traffic will be allowed in or out of Watertown until further notice.The suspect is considered armed and dangerous. A robbery at a Cambridge 7-Eleven Thursday night was followed by the fatal shooting of a MIT campus police officer, then a carjacking by the suspects, which turned into a shootout in Watertown on early Friday morning, with one suspect pronounced dead at a hospital after the shootout and the other at large.