Investigators are looking into an accident involving a car, a fire truck and a police cruiser.
It all started when fire officials responded to the scene of a car fire on Interstate 495 in Norton on Sunday.
State police were called in to block off the scene and that's when another car hit the cruiser, which then hit the fire truck.
The trooper was not in his car at the time, and no firefighters were hurt.
The driver of the other car was taken to the hospital.