Box Hill Sexual Offences and Child Abuse Investigation Team detectives are investigating a suspected attempted child stealing incident in Blackburn last week.
Police have been told an 11-year-old boy was walking home from school along Halley Street when he was approached by an unknown man driving a white van about 3.45pm on Monday, 18 November.
The man pulled onto the wrong side of the road, rolled down his window and told the boy his mum asked him to give him a lift home.
The boy declined the man's offer and the van drove away.
The victim, who was not physically injured, was able to walk home and notify his mum of the incident which was reported to police.
Investigators have released a computer-generated image of a man they believe may assist with their enquiries.
He is perceived to be Caucasian in appearance, aged between 30-40 with dirty, matted, blonde hair.
Detectives have also released CCTV and images of a van seen in the area prior to the incident and wish to speak to the driver.
Detectives have also released an image of a similar style van described as white, with triangular lights and black wheels.
Any witnesses, anyone with CCTV, dash cam vision or information is urged to contact Crime Stoppers on 1800 333 000 or anonymously at www.crimestoppersvic.com.au