It happened on Saturday afternoon at Farmfoods on Boundary Road
At 3.45pm on Saturday afternoon, emergency services were called to Farmfoods on Boundary Road to reports of an altercation between a suspected shoplifter and a security guard, during which the security guard sustained a stab wound to his stomach. He has been taken to hospital for assessment of his injuries, which are thought to be non-life threatening.
The offender made off from the scene and enquiries are ongoing to locate him. He is described as a white male around 5ft 8in tall, with dark hair, wearing a grey tracksuit and black trainers.
CCTV, forensic and witness enquiries will be ongoing and officers remain in the area to provide reassurance.
Anyone who witnessed this incident is asked to contact @MerpolCC, call 101 with reference 19100607404 or Crimestoppers anonymously on 0800 555 111.