An attack outside the Walmart on Empress Street sent one man to hospital just before 5 p.m. on Tuesday.
Police said they received reports of an assault with a weapon.
A 38-year-old man was taken to hospital with serious but non-life threatening injuries.
The victim told police he was in the parking lot outside the store when a man he didn’t know ran toward him.
The victim slipped and fell, at which time the suspect pulled out a knife and stabbed him once in the upper body. The suspect then took off without saying or stealing anything.
General Patrol and the K-9 unit were not able to find the suspect.
No employees or customers inside the store were involved in the attack.