Three men made off with alcohol and cigarettes from an off licence on the Antrim Road in Glengormley yesterday afternoon (Tuesday, December 11).
A female member of staff was not injured but left badly shaken following the incident which occurred around 3:25pm.
They demanded a sum of money before making off with a quantity of alcohol and cigarettes.
The men are believed to have made off towards the Ballyclare Road.
One of the men is described as being around 5ft 9ins in height and of muscular build.
He was wearing a white mask, and a black hooded top with black tracksuit bottoms. Another of the men is described as 5ft 9ins tall and of slim build. He was wearing a dark grey hooded top, black Nike tracksuit bottoms and he had a scarf covering his face.
The third man is described as 5ft 9ins in height and of slim build. He was wearing a two-tone navy and red jacket with dark grey tracksuit bottoms.
Inspector Gilbert said enquiries are continuing and they are appealing to anyone with any information to contact police on 101, quoting reference number 790 11/12/18.
Alternatively, information can also be provided to the independent charity Crimestoppers on 0800 555 111 which is 100% anonymous and gives people the power to speak up and stop crime.