Transit Crime Investigation Unit detectives are investigating following a sexual assault in Dandenong last month.
It is understood a 37-year-old woman was sexually assaulted when she was travelling on a Route 811 bus between Dandenong Railway Station and Brighton about 6.30am on 17 February.
Police were told the male offender boarded the bus at Dandenong Railway Station.
He was last seen departing the bus on the corner of Ivy Street and Lower Dandenong Road.
Detectives have released images of a man they believe may be able to assist with their enquiries.
He is perceived to be Indian/Sri Lankan/Pakistani in appearance, of thin build with short dark hair.
The man was wearing glasses and a red T-shirt.
Anyone who witnessed the incident or has information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au
