A staff member at a shop in Newry has been threatened as knifepoint as she was forced to hand over cash to a robber during the incident on Saturday evening.
Police said the shop on Stream Street was robbed at around 5.20pm.
They said the man entered the shop with the weapon before threatening the woman and then making off from the scene on foot.
Police are currently hunting for the suspect.
A PSNI spokesperson said: “The robber is described as a white male, approximately 6ft tall with a heavy build and was wearing a black coat , a red coloured hoody with the hood up, dark coloured trousers and black trainers.
“The investigation is ongoing and anyone with information or any dash-cam, mobile or CCTV footage, or who may have witnessed a male matching this description in the area during this time are asked to contact police on 101, quoting reference number 1099 18/01/25.”