An Alberta RCMP officer fired at two men when an altercation broke out during a traffic stop Saturday evening, killing one and leaving the other in hospital.

An officer with the Wetaskiwin detachment pulled over a vehicle near Ma Me O Beach, about 45 minutes south of Edmonton, around 9:30 p.m. local time on the suspicion that the driver was impaired.

"During the course of the confrontation the RCMP officer discharged several shots. Two males inside the vehicle were shot," said Clif Purvis, director of the Alberta Serious Incident Response Team (ASIRT).

A 30-year-old man from Pigeon Lake was killed. A 41-year-old male, also from Pigeon Lake, was transported via air ambulance to Royal Alexandra Hospital where he remains in stable condition.

Saturday’s incident marked the second police shooting in Alberta in less than a week.

On Thursday, Mounties shot and wounded Curtis Hallock, who regularly appeared on the outdoor reality show “Mantracker,” during an altercation after pulling him over for suspected impaired driving.

Hallock, a fan favourite on the show, was shot in the leg and arm Thursday night after police pulled him over in Grande Cache, about 400 km west of Edmonton.

Hallock fled the scene but was quickly caught and taken to hospital.

On Saturday, his sister Priscilla Bowen said her brother was in stable condition in a hospital in Grand Prairie and was scheduled to undergo surgery.

Bowen said Hallock has not been charged.

"We are very grateful that he is doing well and that he is safe but we are really concerned about being shot at repeatedly by RCMP while unarmed," Bowen said Saturday.

The ASIRT team, which probes incidents involving police that result in serious injury or death, has opened investigations into both incidents.

The independent agency is also probing a Taser incident that left a 27-year-old man dead. RCMP in Leduc, just south of Edmonton, responded to a series of calls on Friday for auto thefts, assaults and other incidents and located a suspect at a PetroCan location.

A physical altercation ensued that included the use of a Taser, police said. The man lost consciousness after he was taken into custody and he was transported to an Edmonton hospital. He died on Sunday.

"At this point we don't know whether or not it contributed to the medical condition or subsequent death of this individual," Purvis said.

Officials said there was no immediate indication that the use of the Taser and the suspect’s medical condition were related.

With files from CTV Edmonton