A Toronto subway worker has been suspended, after two cars sped along a tunnel with the doors wide open.

The six-car train was about one third of the way to the next station during rush hour on Tuesday before it stopped. After the doors were closed, it limped to the next station and was taken out of service.

An official with the Toronto Transit Commission says a control system linking the two cars to the rest of the train was disabled to prevent the brakes from locking. That also disabled the door mechanisms, preventing them from closing.

One of two crew members has been suspended, pending disciplinary action.