MBTA resumes Green Line trolley service following derailment in Allston

No one was injured Monday when an MBTA trolley derailed with about 30 passengers on board, the agency said.

The Green Line trolley derailed at Packard's Corner in Allston about 1:40 p.m., an MBTA spokesperson said in an email.

The passengers safely exited the train.

Buses replaced trolley service between Kenmore and Washington Street Monday night through Tuesday morning while MBTA personnel worked to get the trolley back on the rails. The MBTA announced regular service resumed Tuesday at 5:22 a.m.

The cause remains under investigation.

The Federal Transit Administration and the state Department of Public Utilities have been notified.

The MBTA, which oversees the nation’s oldest subway system as well as commuter rail, bus and ferry service, has come under intense scrutiny in recent years for a series of safety issues that led to a federal review and orders to fix the problem.

It has recently been plagued by slow zones, the delayed delivery of new vehicles and understaffing.