A man is in custody after an aggravated carjacking involving a firearm in Lynbrook on Thursday 29 November.
Investigators have been told three men met two other men, known to them, at a car park at a licensed premises on the South Gippsland Highway about 6.40am.
A verbal altercation took place and one of the trio allegedly produced a firearm before one of the men fled in the victims Ford utility.
Police located the stolen car at a shopping centre car park on Overland Drive in Narre Warren about 8.30am.
Shortly later two off-duty officers arrested the man inside the centre.
He is currently assisting police with their enquiries.