Shuttles buses are replacing service on the Red Line between Harvard and Broadway, the MBTA said Tuesday.
A maintenance vehicle derailed at Park Street station Tuesday morning, according to the MBTA.
South Shore customers should consider using the Commuter Rail for service to South Station, the MBTA said.
“Personnel remain on scene working to resolve the issue,” the MBTA wrote on X, formerly Twitter.
This story is developing and will be updated once more information becomes available.






