A teenager was snatched off the street in Lachine on Tuesday morning, beaten and later dropped off in neighbouring Dorval, Montreal police say.
The boy was taken from the corner of 45th Avenue and Victoria Street, police said.
Passers-by found him on the ground, beaten, just after 9 a.m. on Garden Crescent in Dorval.
"For now, we're trying to know what happened. Is it related to street gangs? Is it related [to money] or stuff like that? That is what we are trying to know," Montreal police spokesperson Jean-Pierre Brabant said.
He added that investigators are meeting with the victim to find out whether he knows his assailants.
The teen has been released from hospital.