SOMERVILLE, MASS. (WHDH) - An early morning crash between two trains in Somerville on Sunday that left five people hospitalized forced buses to replace service on a stretch of Green Line as investigators work to determine what cause the crash, officials said.

A Green Line train with five passengers aboard struck a stationary train that was out of service and had no passengers at East Somerville Station around 12 a.m., according to an MBTA spokesman.

One passenger reported a neck injury and was taken to Mass. General Hospital.

All four Green Line operators was taken to a nearby hospital, where they were conscious and alert.

Shuttle buses are replacing service between North Station and Medford/Tufts Station while the NTSB investigates.

The Federal Transit Administration was notified of the incident.

In a statement, a T spokesman said, “The MBTA apologizes to Green Line customers who are impacted by the disruption in service, following a late night incident involving two trains.”

This is a developing news story; stay with 7NEWS on-air and online for the latest details.

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