Transit Crime Investigation Unit detectives are appealing for public assistance after a man sexually assaulted a woman on a train last week.
It is understood the unknown man approached a woman on a city bound Cranbourne line train between Dandenong Station and Hughesdale Station about 6.05pm on Tuesday, 13 January.
The man sexually assaulted the 18-year-old victim before exiting the carriage.
He was last seen boarding a bus on Waverly Road in Chadstone a short time later.
Investigators have released images of a man they believe could assist with their enquiries.
He is believed to be between 20 and 30 years old with tanned skin, black curly hair and brown eyes.
Anyone who witnessed the incident or has information that could assist police in identifying the man is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au
