Detectives are investigating the armed robbery of a convenience store in Woodridge this afternoon.

Just after 5pm a group of four teenagers, one of whom was armed with a knife, entered the business on Smith Road.

The group demanded money from a male staff member before leaving with a sum of cash and quantity of cigarettes.

The teenagers  fled the scene in a black Holden HSV, which had been reported stolen from Marsden and had also been sighted in Algester this afternoon.

The male staff member received minor bruising during the robbery.

The vehicle is described as a black 2003 Holden HSV Clubsport (similar to pictured) with Queensland registration 276-TKU.

Anyone with information is urged to contact police.