A Green Line car derailed around 11 a.m. NBC Boston reports 11 people were injured, including the driver.
Bryan Marden, who was on the car that derailed, and who took photos, reports:
The train I was on was a 1-car D train bound for Riverside. At the point where the C and D trains split in the tunnel, the train careened off the tracks at a high rate of speed.
The Green Line is shut between Kenmore and St. Mary's on the C Line and Fenway on the D Line.
"This is not the service we want to run," MBTA General Manager Steve Poftak said at a press conference at which he pledged a complete investigation.