Doors swing open on train travelling at 100km/h

The doors of a packed Geelong-bound train swung open while travelling more than 100km/h today.

The doors on the 3.59pm express service worked their way open, leaving passengers in one carriage with nothing between them and the ground.

Train operator V/Line has said the train would have been travelling at speeds of up to 110km/h.

This happened on one of the older H-class carriages, a refurbished version of a train from the 1970s.

Due to the age of the train, it lacked modern passenger intercoms. V/Line only found out about this when a passenger tweeted about it.

Network control then alerted the conductor who attempted to close the door, although passengers say she was unsuccessful.

Passengers said the train left for another station with the doors still open.

V/Line said the train has now been taken out of service while it investigates the cause of this fault, and said it is taking the issue "very seriously".