(REUTERS) - Following is the text of a statement issued by the Middlesex County District Attorney on Friday:

"Police are investigating a fatal shooting of an MIT campus police officer by two men who then committed an armed carjacking in Cambridge, Middlesex Acting District Attorney Michael Pelgro, Cambridge Police Commissioner Robert Haas, and MIT Police Chief John DiFava announced this evening.

At approximately 10:20 p.m. April 18, police received reports of shots fired on the MIT campus. At 10:30 p.m., an MIT campus police officer was found shot in his vehicle in the area of Vassar and Main streets. According to authorities, the officer was found evidencing multiple gunshot wounds. He was transported to Massachusetts General Hospital and pronounced deceased.

Authorities launched an immediate investigation into the circumstances of the shooting. The investigation determined that two males were involved in this shooting.

A short time later, police received reports of an armed carjacking by two males in the area of Third Street in Cambridge. The victim was carjacked at gunpoint by two males and was kept in the car with the suspects for approximately a half hour. The victim was released at a gas station on Memorial Drive in Cambridge. He was not injured.

Police immediately began a search for the vehicle and were in pursuit of the vehicle into Watertown. At that time, explosive devices were reportedly thrown from the car by the suspects. The suspects and police also exchanged gunfire in the area of Dexter and Laurel streets. During this pursuit, an MBTA Police officer was seriously injured and transported to the hospital.

During the pursuit, one suspect was critically injured and transported to the hospital where he was pronounced deceased.

An extensive manhunt is ongoing in the Watertown area for the second suspect, who is believed to be armed and dangerous.

The case is being investigated by local, state and federal authorities working in cooperation. The Massachusetts State Police Bomb Squad is assessing and removing any potentially explosive devices that may have been thrown on the street in Watertown by the suspects.

The investigation remains active and ongoing.

No further information is available at this time."