Detectives from Geelong Sexual Offences and Child Abuse Investigation Team are investigating a sexual assault which occurred in Geelong last month.
Investigators have been told a 29-year-old woman was at a supermarket on Malop Street about 8.15am when she was approached by an unknown man.
The man sexually assaulted the woman before walking off and leaving the store.
He is perceived to be Caucasian, 25-35-years-old with blonde hair.
At the time of the incident he was wearing a dark jacket and carrying a backpack.
Investigators have released images of a man they believe may be able to assist with their enquiries.
Any witnesses or anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au.