A fight in a St. Leonard park late Tuesday afternoon turned violent.
A man in his 20's was stabbed during an argument with 3 other people.
Police say the victim was attacked with a knife and is in serious condition after sustaining injuries to his upper body.
He was conscious when transported to hospital.
The suspects fled the scene in a car, it's not clear if the victim knew his attackers.
The incident happened at a park near the intersection of Viau Boulevard and Terbois Street.
No arrests have been made.
Investigators are meeting with witnesses in the area.