Updates and video On Boston Marathon Bomber Manhunt: Police say one suspect dead, the other on the run

A late-night police chase and shootout has ended with one marathon bombing suspect dead and another on the run here, Boston Police commissioner Ed Davis said early Friday morning. One police officer was killed and another seriously wounded during the pursuit.

Federal agents swarmed neighboring Watertown after local police were involved in a car chase and shootout with at least one of the suspects. During the pursuit, officers could be heard on police radio traffic describing the suspects as having grenades and other explosives.

At approximately 10:30 p.m. Thursday, a robbery was reported at a 7-Eleven in Cambridge, Davis said. An MIT officer responding to the robbery was shot, and later pronounced dead. The suspects fled in a stolen Mercedes-Benz. Watertown Police spotted car and shots were fired between police and the suspects.

One suspect was shot by police and later died, but the second fled on foot, and a tense manhunt ensued.

"We believe this to be a terrorist," Davis told reporters at a hastily arranged press conference in Watertown. "We believe this to be a man who has come here to kill people. We need to get him into custody."

See video and more pictures after the cut...

An MTA officer was seriously wounded during the exchange of gunfire, Davis said.

The FBI has yet to publicly confirm a connection between the events in Watertown and the twin explosions that killed 3 people and injured 170 others at the Boston Marathon on Monday. But according to Boston Police, the suspect who remained at large—a.k.a Suspect Two—was the "one in the white hat" seen in the photos released by the bureau on Thursday.

In a radio alert sent issued to fellow officers, the suspect was described as a "white male with dark complexion or a Middle Eastern male with thick curly hair wearing a charcoal gray hooded sweatshirt ... possibly with an assault rifle and explosives." Police in Watertown, Newton, Brighton and Cambridge were put on high alert as the suspect was said to be armed with a "long gun."

"We are aware of the law enforcement activity in the greater Boston area," Boston FBI spokesman Greg Comcowich said in a statement to Yahoo News. "The situation is ongoing. We are working with local authorities to determine what happened."

Source: Yahoo News

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