A mule deer buck shot near Stewart Valley, Sask., has tested positive for chronic wasting disease.

Art Jones of Saskatchewan Environment said that makes four positive cases in wild mule deer, including three bucks and one doe taken near Saskatchewan Landing. There have been eight positive cases in wild deer since the late 1990s.

The latest case was from an animal shot last fall by a hunter, who submitted the head for testing.

A mid-winter hunt under way around the provincial park for white-tailed or mule deer concludes March 31. It was ordered by Saskatchewan Environment to reduce herd numbers and provide samples for CWD testing.