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

The National Transportation Safety Board said its team will arrive Sunday to begin an investigation into the crash.

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.

A train carrying five passengers collided with a stationary out-of-service train at East Somerville Station shortly after midnight on Sunday.

According to the MBTA, just before 12:30 a.m. a train carrying five passengers struck a stationary out-of-service train parked at East Somerville Station.

SOMERVILLE, Mass. — An investigation is underway after a Green Line train derailed overnight in Somerville. According to the MBTA, the incident occurred around 12:30 a.m. on Sunday when a Green Line train carrying five passengers collided with an out-of-service train that was unoccupied.