An out-of-service Green Line train derailed Saturday morning, causing delays on the B branch as the train blocked tracks in both directions.
No one was hurt when the back of the two-car train derailed near Blandford Street while moving from a side track to the main line around 9:30 a.m., MBTA spokesman Joe Pesaturo said in an e-mail.
Delays were expected as Route 57 buses replaced train service along Commonwealth Avenue while MBTA crews work to re-rail the train, the MBTA said.
A brick inspectors’ booth located between the tracks appeared to have been knocked from its foundation by the train. The tracks were not damaged, Pesaturo said.
The cause of the derailment is under investigation, he said.Lucas Phillips can be reached at firstname.lastname@example.org.