A 60 year old man was stabbed inside a downtown apartment early Sunday morning.
The incident occurred inside a unit of a building on Chomedey Street near Ste-Catherine at around 2:00.
The victim was taken to hospital with serious injuries to his upper body. Another 60 year old was arrested at the scene by police officers.
The suspect is being questioned, but so far no motive has been established.
Investigators are trying to determine the events that led to the man being stabbed.