A man was taken to hospital in serious condition after being stabbed at a townhouse complex in the Humber Summit area overnight.
Police were called to the area of Duncanwoods Drive and Islington Avenue at around 1:30 a.m., Toronto police said.
Officers located a victim with multiple stab wounds in the complex.
According to reports from the scene, he was stabbed with a box cutter.
Toronto Paramedic Services said they transported a young man to hospital with serious injuries.
There is no information about possible suspects so far.