A Green Line train hit a parked train at the MBTA East Somerville Station early Sunday morning. Five people were taken to the hospital.

A passenger told CBS News Chicago that the train stopped abruptly and made no loud noises. The operator then announced that the train had derailed, which the agency later confirmed.

Five people were taken to a hospital early Sunday morning after an MBTA Green Line train with passengers hit a stationary train at a station, according to the MBTA.

CTA Green Line services mostly resumed Monday after a derailed train forced passengers to be rescued on the South Side early in the morning. According to the Chicago Transit Authority, Green Line service was temporarily suspended between 35th-Bronzeville-IIT and 63rd Street,

The National Transit Safety Board is investigating after a train carrying five passengers collided with a stationary out-of-service train at East Somerville Station Sunday.

A train on the MBTA's Green Line collided with an out-of-service train at a station in Somerville early Sunday morning.