The buses will run between North Station and Medford/Tufts and Union Square in Somerville, the MBTA said in a post on social media early Wednesday morning.

The MBTA is currently investigating how “human factors,” including the train operator’s action, could have been involved with the incident.

An investigation is underway following the latest derailment of an MBTA Green Line trolley in Cambridge on Monday evening. MBTA officials tell Newscenter5 that the NTSB is stepping in and taking over the investigation into the derailment that sent several passengers to the hospital with minor injuries.

Shuttle busses continue to replace service on Wednesday morning after a Green Line train derailment in Cambridge on Tuesday.

A Green Line train derailed Tuesday near an MBTA station in Cambridge, Massachusetts, during the evening commute, and some injuries have been reported. The MBTA said shuttle buses are replacing service between North Station and Medford/Tufts due to the derailment at 10 Morgan Ave,

Transit officials say shuttle buses will replace service in this area through the end of service on Tuesday and into the Wednesday morning commute.

Seven people suffered minor injuries Tuesday evening after a Green Line train derailed near Lechmere Station in Cambridge, Massachusetts. The Massachusetts Bay Transportation Authority chief said the agency is focused on investigating "human factors" in the derailment.

A Green Line train suddenly derailed during the evening commute on Tuesday near Lechmere station, forcing dozens of passengers to evacuate and causing minor injuries to seven people, officials said. The wheels on the lead trolley came off track around 5 p.