A 65-year-old man is listed in critical condition in hospital after a stabbing at a restaurant in Cote-des-Neiges.
The incident happened at around 8:40 at the Al-Amine Lebanese restaurant on Lacombe Ave.
A witness told police that a 56-year-old suspect, a former employee of the restaurant, entered and got into an argument with the victim.
The victim sustained stab wounds to the upper body as a result of the altercation, and was rushed to hospital.
The suspect was taken to a detention centre for questioning.