A safety device not worked properly. Fortunately no passengers were hurt and after the train was brought it to JFK/UMass Station passengers got off. The train is out of service and currently at a Red Line maintenance facility in South Boston. “Passenger safety is the highest priority for the MBTA and this highly troubling incident is under investigation by Transit Police detectives,” MBTA General Manager Frank DePaola said in a statement. He also assured about his commitment to find the truth about this uncommon situation considered a highly troubling incident.