A police operation is currently underway at Railway Street, Woy Woy.
Emergency services were called to the location just after 11am today, following reports a man on a mobility scooter had been struck by a train.
All north and south bound trains have been suspended.
Officers attached to Brisbane Water Local Area Command have commenced inquiries into the incident.
No further information is available at this stage.
Trains are suspended between HORNSBY and GOSFORD with replacement buses operating. Allow plenty of extra travel time.