Police are appealing for public assistance following reports of a sexual touching incident at Tuggerah railway station.
Officers arrived at about 4am on Monday, October 21, and were told an unknown man has sexually touched a 51-year-old woman using a gap between the seats while on a train.
As inquiries continue police have released an image of a man who might be able to assist police in their investigation.
Anyone with information that could assist investigators is urged to contact Crime Stoppers: 1800 333 000.