Detectives from Stonnington Crime Investigation Unit are hoping to identify a man following an armed robbery at a convenience store in Windsor last month.
Police have been told an unknown man entered the Dandenong Road store about 10.35pm on Tuesday, 4 May.
The man produced a large knife and threatened staff before jumping through the security screens.
He stole a large amount of cigarettes before fleeing on foot towards the St Kilda area.
No one was physically injured during the incident.
Detectives have today released a CCTV image of a man who they believe can assist with their investigation.
The man is perceived to be Caucasian in appearance, solid build, about 170cm tall and was wearing a grey hooded jumper and black pants.
Anyone who recognises the man or with information is urged to contact Crime Stoppers on 1800 333 000 or make a report online at www.crimestoppersvic.com.au.
