Hobsons Bay Crime Investigation Unit detectives are appealing for information following a theft at an Altona North gym last month.
It is understood a man entered the locker area at a gym on Millers Road and stole two sets of keys about 8.20pm on 27 March.
Police were told the man was confronted by a gym user and dropped one set of keys, before fleeing the scene in a dark grey SUV.
Investigators have released CCTV images of a man they believe can assist with their enquiries.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or make a report online at www.crimestoppersvic.com.au.
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