Police are searching for a three men who beat up a 26-year-old man in Mount Royal Park after he intervened to ask them to stop pulling branches off a tree. The victim is in critical but stable condition.

The assault took place at about 6 p.m. in a spot best known for the well-attended weekend tam-tam jam sessions just southwest of Park and Mount Royal.

The victim was left with serious injuries to the upper body after being punched and kicked repeatedly by the three attackers.

Police are waiting to interview the witness to get a description of the attackers, according to a Montreal police representative.