The Alberta Serious Incident Response Team says it is investigating the shooting that happened early Monday in the town of Redcliff, northwest of Medicine Hat.
The agency says in a news release that a man walked into the local detachment and, "when approached by police, he produced and pointed what appeared to be a firearm."
An officer shot and wounded the man and he was taken to hospital.
ASIRT, a provincial unit that investigates the use of force by police, provided no other details.
RCMP would only add that the injured man is a civilian.