Dzhokhar Tsarnaev is Suspect At Large, Tamerlan Tsarnaev is Suspect Killed in Firefight

The two men suspected in the Boston Marathon bombings which killed three people and injured nearly 200 terrorized Cambridge and Watertown, Massachusetts late Thursday night and early Friday morning. One has been confirmed dead, but the other is at large following a night of horrific violence which saw an MIT police officer slain, an MBTA officer in critical condition, and automatic gunfire and explosions rocking through suburban neighhorboods. Boston's public transport authority has sent buses to evacuate the Watertown area.

The terrorist remaining at large is believed to be "suspect number two" identified via footage from the FBI, now said to be Dzhokar Tsarnaev, 19, a Chechen legal resident.

Images taken of the suspect, as well as police firsthand observation, match the photo of "suspect number two," a man with bushy, wavy black hair, a prominent chin and nose, a slim build, and wearing a white hat.

Various reports suggest Tsarnaev is armed with firearms and explosives and is extremely dangerous, having successfully evaded thus far a manhunt involving hundreds if not thousands of police officers. Anyone in Watertown or closely surrounding areas subject to the manhunt is advised to stay indoors, lock all access points to their home, and only open their door for uniformed police officers conducting a search.

Suspect number one is believed to be his brother Tamerlan, who was killed in a firefight with police early Friday morning. It is currently unknown how Tsarnaev was able to escape the police hunt which ended in the termination of his accomplice.