Chief Troy Copper says two officers were responding to related calls on Tuesday night about people fighting and a woman being assaulted.
Copper says the officers were confronted by a 27-year-old man holding a knife.
The man, whose name has not been released, was taken to hospital where he died.
The chief says the officers are on days off and their status will be evaluated.
There will also be a further investigation into what happened.
"During this thorough investigation, an independent observer appointed by the Ministry of Justice will act as oversight and he'll report to the deputy minister," Copper said.