A man held staff at a Ballymena store at knife point before stealing the till.
The man entered the Queen Street shop at around 6.30am on Monday, September 11.
Inspector Shaf Ali said: "The male is described as being approximately 6 foot tall, and had his face covered with a dark coloured balaclava.
“Police are appealing to anyone who was in the area at the time and saw any suspicious activity, or anyone who knows anything about the incident to contact police on the non-emergency number 101, quoting reference number 147 of 11/09/17.
“Alternatively, information can be passed anonymously through the Crimestoppers charity on 0800 555 111.”