Detectives are appealing to the public to help them investigate an unlawful assault on a bus in May.
Investigators have been told the victim, a 17-year-old girl, caught a replacement bus in Maribyrnong about 4.15pm on May 8.
As the bus was travelling towards Moonee Ponds, it is alleged a man approached the girl, produced a silver pointed object and placed it in front of her chest.
Investigators have been told the victim and man got off the bus on Ascot Vale Road but he did not approach the girl again.
The offender is perceived to be Middle Eastern in appearance, 40-50 years of age with a broad build, dark eyes and a strawberry blonde/brown scruffy beard.
He was wearing reading glasses with a thin gold frame.
Investigators have released a computer-generated image of a man they believe may be able to assist with their inquires.
Anyone with information or footage is urged to contact Crime Stoppers on 1800 333 000 or visit www.crimestoppersvic.com.au
