Police are investigating an armed robbery of a 65-year-old man in Mill Park earlier this month.

Police believe that three or four young men, aged between 18-20 years old, and armed with knives, approached the man on Morang Drive at about 12pm on Tuesday, August 1 and demanded cash.

The man produced the cash and the offenders left without injuring him.

Investigators have released an image of a man they believe may be able to assist with their enquiries.

mill park armed robbery August 1

Anyone with information or who may have dash-cam footage of the incident is urged to call Crime Stoppers on 1800 333 000.