Officers responded to a call around 9:30 p.m. and found a man with stab wounds at a parking lot near a bike path at Bloor Street and Simcoe Street.
He was rushed to hospital in critical condition where he later died.
There’s no word yet on any suspects. Police said a male was detained but later released.
This is the second homicide in Durham Region this year.
Anyone with information is asked to call either Det. Horrocks or Det. Short at the Major Crime Homicide Unit at 1-888-579-1520 ext. 5418 and ext. 5407 respectively.