The cause of a collision between a Green Line trolley and an MBTA para transit vehicle is under investigation today following a mid-morning accident on Huntington Avenue.


An MBTA spokesman said the collision happened at 9 a.m., and that no passengers were injured.


Following the accident, a witness snapped a photograph and Tweeted it, along with the caption, "rough times for @mbtaGM. hope no one was hurt. #mbta #Eline."


On Oct. 8, two Green Line trollies collided on Huntington Avenue between Brigham Circle and Longwood Medical Area stops.


A T spokesman said that two passengers and a trolley operator reported back and neck pain.