A man is in serious but stable condition after being stabbed in Longueuil on Sunday morning.

Police say they got a call at 7:20 a.m. Upon arriving at the scene, they found two victims outside. A man in his 30s had suffered stab wounds to his upper body while a woman in her late 20s or early 30s was not stabbed but had suffered other minor injuries.

Inside an apartment at the scene, another man was found, also injured. Police said they don’t know what the relationship is between the three people or what might have been the motive behind the attacks.

One couple who live nearby said they heard yelling but weren’t sure if it was related to the attack.

A command post has been set up on the scene as Longueuil police continue their investigation.