Transit Crime Investigation Unit detectives are appealing for public assistance after a woman was sexually assaulted on a train in Melbourne between Richmond and South Yarra in on 4 April.
Investigators have been told a man boarded a Frankston bound train from Footscray just after 11am.
It is believed he approached an 18-year-old woman and sat down before touching her inappropriately.
Another unknown passenger asked her if she knew the man and when she shook her head, the passenger told him he was making the woman feel uncomfortable.
He then got off train and it is believed he was last seen getting off a bus at Malvern train station about 11.40am.
The offender is perceived to be Caucasian in appearance, aged in his mid-40s, approximately 180cm tall with a medium build
He was last seen wearing a dark singlet with a camo pattern, dark coloured cargo pants, and a grey fedora hat.
Investigators have released an image of a man they believe may be able to assist with their investigation.
Anyone who witnessed the incident or with information about the identity of the man is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au
