A low-speed derailment near Lansdowne station is causing delays on all Framingham/Worcester MBTA Commuter Rail trains on Thursday afternoon.
The derailment was reported around 4 p.m. on an inbound train. The train remained upright.
No passengers were riding in the coach that derailed and no injuries were reported.
Buses were taking passengers from South Station and Back Bay to Newtonville Thursday night, where commuter trains picked them up before making all stops westbound to Worcester. Inbound passengers were also taken to Newtonbille and transferred to shuttle buses.
There were delays of up to 50 minutes Thursday evening.
Passengers riding on the Framingham/Worcester Line Friday morning are being asked to plan for an "additional 20 to 30 minutes of travel time."
"They pulled us underneath a tunnel and wee were underneath a tunnel, and they just didn't have any answers for us, so it was scary. A lot of anxiety going through me," said one woman. "It's cold. I'm a single mom of three babies ... They had us come off the train and then go into another train."
"This is my second time in Boston in four months, and my second train derailment in four months," said Angie Kinney, who was on her way home from a Harlem Globetrotters game she attended with her daughter.
Aerial video from NBC10 Boston's Sky Ranger helicopter showed some passengers walking along the tracks on foot, apparently in the process of being transferred from one train to another.
Keolis, which operates the commuter rail, said an operations crew is working on a solution now and updates will be provided as they become available.
Keolis said initial findings suggest the derailment was a result of operator's error in lining a switch.