Police search for suspect after gunfight outside Boston; explosives reportedly detonated BREAKING NEWS: Police in the Watertown neighborhood of Boston were searching for a heavily armed suspect who may have been involved in the shooting death of an MIT police officer after reportedly taking another suspect into custody early Friday. Police and federal authorities were investigating if the suspects are possibly tied to the Boston Marathon bombing. WCBV-TV said the suspects threw and detonated explosives during a car chase with police. Police were working to apprehend a young male with a hat on who was reportedly pulling on vehicle doors, according to police scanner traffic. An FBI official told Fox News early Friday that one person was in custody and an officer was down but said it was too early to tell if the police activity in Watertown or the MIT shooting were related to the Boston Marathon bombing. Dozens of officers and National Guard members descended on Watertown shortly after the shooting outside a building on MIT's campus in Cambridge, according to the Associated Press. Authorities were calling for somebody to get on the ground and put their hands up and a loud thud was heard after someone shouted "fire in the hole," the news agency reported. Witnesses told The Associated Press they heard multiple gunshots and explosions at about 1 a.m. Friday. Dozens of police officers and FBI agents were in the neighborhood and a helicopter circled overhead. State police spokesman David Procopio told news agency, "The incident in Watertown did involve what we believe to be explosive devices possibly, potentially, being used against the police officers." Fox News reporters on the scene cannot yet confirm these reports. Earlier Friday, Cambridge police and the Middlesex District Attorney's office said the MIT officer was responding to a report of a disturbance when he was shot multiple times late Thursday. He later died at a hospital. His name was not immediately released. Procopio said the shooting took place about 10:30 p.m. outside an MIT building. The area was cordoned off and surrounded by responding law enforcement agencies, according to a posting on the university's website. Procopio said authorities were searching for a suspect or suspects. No arrests have been made. The university described the situation late Thursday as "active and extremely dangerous." People were urged to stay away from the Stata Building, a mixed use building with faculty offices, classrooms and a common area. The shooting came little more than three days after the twin bombings on the Boston Marathon that killed three people, wounded more than 180 others and led to an increase in security across the city. Click here for more from MyFoxBoston.com. Click here for more from WCVB.com. Fox News' Jennifer Griffin, Jana Winter, Mike Tobin, Mike Levine, Griff Jenkins and The Associated Press contributed to this report.