Police are investigating after an overnight stabbing sent a 47-year-old man to hospital. 

Emergency crews were called to the apartment building at 71 Thorncliffe Park Drive, near Overlea Boulevard, at about 1 a.m. by numerous 911 calls, according to police.

They found the victim outside one of the apartments, suffering stab wounds, and he was rushed to hospital in critical condition. 

Police at 53 Division say he has since been upgraded to serious but stable condition. 

There was no immediate word on a suspect. Investigators are talking to witnesses.