Melbourne Embona Taskforce detectives are investigating following a robbery in the Melbourne CBD in June.
Investigators have been told a male victim was walking west along Little Lonsdale street when he was approached by another male on 22 June around 11.15pm.
After a brief verbal altercation, the offender attempted the snatch the victim's backpack, then struck the victim in the head multiple times.
The offender then fled the scene with the victim's backpack.
Investigators have released an image of a male they believe can assist them with their enquiries.
The male is perceived to be Caucasian in appearance, with short brown hair, and was wearing a black hoodie, khaki coloured trousers, and black shoes.
Anyone who recognises the man is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au
