TORONTO - Police say two men are dead and a third injured after an altercation in an east-end Toronto McDonald's escalated and "multiple" shots were fired early Saturday.

Det.-Sgt. Terry Browne says an armed security guard, who was apparently in the restaurant to buy food, discharged his weapon following a "significant physical altercation" with two men.

Browne says the altercation took place somewhere near the food counter and there were between 15 and 20 customers and staff in the McDonald's at the time of the incident.

Police say the two unidentified men, believed to be aged 25 and 40, were pronounced dead at the scene, while the security guard was taken to hospital for treatment of a hand injury.

Browne says the guard, who was employed nearby, is co-operating with investigators.

Browne says police are not looking for any suspects and says the reason for the confrontation isn't yet known but investigators are going through security video of the incident.