Hobsons Bay detectives are appealing for assistance from the public following an armed robbery in Spotswood.
Officers have been told an unknown man wearing a balaclava entered a supermarket on Hudsons Rd on Thursda, July 13, about 6.30pm.
He threatened staff members with a kitchen knife before stealing alcohol and cigarettes from behind the counter.
The man was last seen heading towards the Spotswood Railway Station.
No one was physically injured.
Investigators have released images and CCTV footage of a man they believe may be able to assist with their enquires.
Anyone who recognises the man or with information that could assist police with their enquiries is urged to contact Crime Stoppers on 1800 333 000 or visit www.crimestoppersvic.com.au