A car on a Boston subway train has derailed, but authorities say no injuries were reported.

Boston-area transit spokesman Joe Pesaturo says the fourth car of a six-car train left the tracks of the city's "T" system just after 4 p.m. Tuesday.

It happened shortly after the train left the Alewife station in suburban Cambridge.

He says 65 passengers safely evacuated. He says service between the Alewife and Harvard stops was suspended in both directions.

Buses are carting commuters until service is restored.

A train and trolley collided in May in Boston and injured dozens of people. Several people were injured when two trains collided in suburban Newton in 2008.