Frankston Crime Investigation Unit detectives are investigating a carjacking in Carrum Downs earlier this month.
A 45-year-old man entered the car park of Carrum Downs Shopping Centre on Hall Road about 9.30pm on 6 November.
As he approached his car, he noticed two men standing near his Nissan Pulsar.
One of the men produced a knife and demanded the victim hand over his keys.
The Malvern East man gave the keys to the offenders, who drove off in his car.
The vehicle was located dumped a short distance away on Broderick Road, Carrum Downs approximately 15 minutes later.
The victim was not physically injured during the incident.
Investigators have released images and CCTV of two men they believe may be able to assist with their enquiries.
The first man is perceived to be Caucasian in appearance and about 172cm tall.
The second man is perceived to be Caucasian in appearance, with light-coloured hair and a muscular build.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or at crimestoppersvic.com.au
