Four balaclava clad men, one wielding a large knife, robbed the Spar Supermarket at the Rivett shops on Tuesday night.
ACT Policing is seeking witnesses to the aggravated robbery, in which a staff member was punched.
Police said the men threatened staff about 8:30 pm before fleeing with cigarettes, a sum of cash and two bottles of wine.
They were last seen running in the direction of Rivett Ovals and may have left the area from Gungurra Crescent in a silver sedan or a green utility.
Police are urging anyone who may have any information, dash-cam or CCTV footage that could assist police to contact Crime Stoppers on 1800 333 000, or via the Crime Stoppers ACT website.