Police are investigating an assault which left a man unconscious in Southbank in October.
Investigators have been told the victim, a 19-year-old Doncaster man, was approached by three men in Blakeney Place near City Road about 4.45am on 27 October.
The three males assaulted the victim, who fell unconscious, before they rifled through his pockets and stole items including his mobile phone, wallet and cash.
The Doncaster man was transported to hospital for treatment.
The offenders are described as aged between 18 to 20-years-old.
The first is perceived to be Middle Eastern in appearance and unshaven, with short hair on the sides of his head and tattoos on his left arm.
He was wearing blue jeans, a black jumper, black shoes, a large black watch and carrying a tan and red satchel bag.
The second is perceived to be Caucasian in appearance and was wearing a denim jacket, black jeans, white t-shirt and black cap.
The third is perceived to be Caucasian in appearance and was wearing a black long sleeve shirt with a white collar, blue/grey jeans and a white cap. He was also wearing Bluetooth earphones at the time.
Investigators are urging anyone who witnessed the incident or who recognises the men to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au