Two store workers have been left shaken, but otherwise unharmed, after an aggravated robbery at Invercargill's Collingwood Foodcentre.
A man got away with cash and tobacco after threatening the workers with a knife about 3am today, detective Tim Cook said in a statement.
"While the victims were not injured in the incident, they are understandably very shaken and are receiving support," he said.
The offender was about 182cm tall and wore a grey hoodie, blue jeans or chinos, a black balaclava and sunglasses.
Police urge anyone with information about the North Road incident to call 105 quoting file number 191109/3839. Information can also be provided anonymously to Crimestoppers on 0800 555 111.