Investigation underway after Green Line train derails in East Somerville

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.

One car from each of the two-car trains derailed.

One passenger and four train operators were taken to the hospital, but all are expected to recover.

Shuttle buses are operating between North Station and Medford/Tufts, though it’s unclear how long they will be in service as investigators work to determine the cause of the derailment.

0 of 9

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

The Federal Transit Administration and the NTSB are investigating the crash.

This is a developing story. Check back for updates as more information becomes available.

Download the FREE Boston 25 News app for breaking news alerts.

Follow Boston 25 News on Facebook and Twitter. | Watch Boston 25 News NOW

©2025 Cox Media Group