"What we're looking for right now is a suspect consistent with the description of suspect number two, the white capped individual who was involved in Monday's bombing of the Boston Marathon," said Colonel Timothy Alben of the Massachusetts State Police in a brief press conference, referencing photos of the bombing suspects released by the FBI Thursday. "You've seen the picture, you all have it. That's the individual that we're looking for at this moment."
A statement from the Middlesex County District Attorney's office said the situation began with a report of shots fired at Massachusetts Institute of Technology in Cambridge around 10 PM. An MIT campus police officer was subsequently found dead in his vehicle. Afterward, police received reports two suspects carjacked a man at gunpoint and kept him in the car for about 30 minutes before releasing him at a gas station.
According to the District Attorney's statement, police searched for the vehicle and pursued it into Watertown where they exchanged gunfire with the suspects, who also threw "explosive devices" from the car. A police officer with the Massachusetts Bay Transportation Authority was "seriously injured" during this pursuit. One of the suspects was also injured and, according to the statement, he was taken to the hospital and pronounced dead.
Alben said the second suspect in the shootings and carjacking was the one who matched the description of the Boston bomber and "was able to flee from that car."
"There is an active search going on at this time," Alben said.