A teenager was stabbed in a late-night fight at a fast food restaurant.

Police say several people were scuffling inside the McDonald's on Ste. Catherine St. near Mackay St. when someone pulled a knife and stabbed a 17-year-old boy in the arm.

The teenager fled and ran to a nearby police station for help, and officers quickly rushed to the restaurant.

At the scene police were able to arrest two men in their twenties and two women aged 18 and 19.

Police say the suspects and the victim know each other.

There is no word on what possible charges the attackers will face, and the condition of the teenager is unknown.