Banyule Crime Investigation Unit detectives are appealing for public assistance following an assault in Heidelberg earlier this week.
It is understood a man was assaulted following an altercation inside a convenience store on Burgundy Street about 4.10pm on Tuesday, 25 April.
The 45-year-old man, of no fixed address, was taken to hospital with serious injuries.
Police were told the offender fled the scene on foot.
He is perceived to be Caucasian, about 180cm tall with a medium build, brown hair and a short beard.
Investigators have released CCTV of a man they believe may be able to assist with their enquiries.
Any witnesses or anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au.
