UPDATE: Fire Truck Involved in Multi-Vehicle Back Bay Crash

Five people - including four firefighters - have been sent to the hospital after a fire truck was involved in a multiple-vehicle crash in Back Bay, the Boston Fire Department said Monday afternoon.

The injuries were not life-threatening, Boston Fire said. The four firefighters were released from Mass. General later in the day. Boston Fire said it didn't have any information on the civilian hospitalized.

The accident occurred when Engine 7 was responding to a Boylston Street fire just before 11:30 a.m. The engine was traveling west on Comm Ave. with lights and sirens on when it crashed into a car at the intersection of Comm and Dartmouth Street.

The engine veered into a parked car, causing a chain reaction that damaged several other parked cars.

Boston Police are investigating the accident.