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

An MBTA Green Line collision injured five people on Sunday, according to a report from NBC 10 Boston. One passenger and four operators were transported to the hospital after the train carrying passengers crashed into an out-of-service train at East Somerville station.

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.