A MAN wearing a black motorcycle helmet threatened a 16-year-old female employee with a knife at a Mount Warren Park supermarket on Sunday afternoon.
The man, who was carrying a green camouflage-print backpack, demanded the teenager fill his bag with cash from the register shortly after 2.45pm on December 8.
He fled the Mount Warren Boulevard store on a black motorcycle after the staff member handed over the money.
No one was injured as a result of the robbery.
Police are searching for a 1.8 metre tall man with a proportionate build.
He was wearing a black motorcycle jacket, dark pants and joggers.
Investigations into the matter are continuing.
If you have information which can assist police contact Policelink 131 444 or Crime Stoppers 1800 333 000.