Eastern Divisional Crime Team detectives are appealing for public assistance following an armed robbery at a Kew service station last Wednesday.
It is believed an unknown man entered the Willsmere Road service station about 10.15pm on 25 March.
The man confronted a staff member with a knife and made demands for cash.
The victim complied and the man took a quantity of cash before fleeing on foot.
Detectives have released images of a man who they believe will be able to assist with their enquiries.
He is perceived to be Caucasian in appearance, aged in his 20s, with a medium build and facial hair.
He was wearing a blue Super Dry zip-up jacket, grey Bonds tracksuit pants and blue runners at the time.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au