FORT MCMURRAY, Alta. -- An agency that investigates Alberta police is looking into whether an RCMP vehicle ran over a pedestrian that had already been hit on a highway by a pickup truck.

The 41-year-old man died at the scene early Sunday on Highway 881 about 75 kilometres south of Fort McMurray.

The Alberta Serious Incident Response Team says in a release that an officer was initially responding to a call about a man walking along the road.

Another call then came in about the man being struck by a truck.

ASIRT says the officer's vehicle had its emergency equipment on when it arrived and had to pass several vehicles that had pulled over.

It says the police vehicle hit the hand of a man standing along the road, and may also have struck the pedestrian lying nearby.

It's not clear if the pedestrian was still alive at the time. ASIRT says people who had stopped on the road had tried to provide first aid to the injured man.

"ASIRT's investigation will focus on the circumstances of the collision or collisions that the RCMP member may have been involved in," said the release.

The agency says it is looking to talk to any witnesses, including the driver of a large commercial vehicle that had stopped on the highway.