A teen was stabbed in the upper body shortly after noon in Montreal's Villeray-Saint-Michel-Parc-Extension borough.
He was transported to hospital, and police say they don't know his condition.
The stabbing happened at the corner of St-Laurent Boulevard and Jarry Street.
The victim, 17, and his assailant were allegedly arguing when one of them pulled out a knife.
After the stabbing, both fled the scene.
Police found the injured teen a few blocks away. They are still looking for his alleged attacker.