A man has been injured after a motorised scooter drove onto railway tracks at Flinders Street Station.

Metro Trains has warned of delays up to 15 minutes on the Werribee, Williamstown, Pakenham, Frankston and Cranbourne lines due to the scooter on the tracks.

The Metropolitan Fire Brigade received a call about 5pm to assist Ambulance Victoria with a man whose mobility scooter had driven off platform eight.

A high-angle rescue team was dispatched to help lift the scooter from the tracks.

Metro closed the line and has diverted services.

More to come