Police are investigating after a man performed a lewd act on a bus in Kurunjang in December.
Police were told a man got on a bus and engaged in sexual activity in the presence of a child about 3.30pm on December 10.
The 458 service was heading towards Kurunjang and it is understood the man left the bus in an unknown direction of travel.
Investigators have released an image of a man they believe may be able to assist them with their enquiries.
He is perceived to be of Caucasian appearance, medium build, short brown hair and a short brown beard.
He was last wearing a red shirt, denim jacket, grey jeans and a dark-coloured cap.
Anyone with information can contact Crime Stoppers on 1800 333 000 or www.crimestoppersvic.com.au.
