Flemington Police are appealing for public assistance following a theft on 20 September.
Investigators have been told a man walked up and asked the victim for a cigarette in a restaurant car-park on Flemington Road about 7.50pm.
The man then grabbed the victims mobile phone and fled.
Police have released CCTV of a man they believe can assist with their enquiries.
The man is perceived to be of African appearance, tall with a skinny build.
He was wearing a black Dickies brand tee-shirt and dark pants.
Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au
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