Police are searching for a man who allegedly exposed himself while travelling aboard a bus from Tarneit to Hoppers Crossing, on March 13.
After boarding the bus in the Tarneit area, at approximately 7.15pm, the alleged offender exposed himself to a young woman.
Police have released an image of a man who they believe may be able to assist in their inquiries.
The man is perceived to be aged in his mid-forties to early fifties, and of a Caucasian appearance.
He was wearing a light brown hat, sunglasses and a grey, long sleeved t-shirt.
Anyone with information is encouraged to contact Crime Stoppers on 1800 333 000.