COLUMBIA, Mo. (AP) — The Missouri State Highway Patrol is investigating after a man died of a gunshot wound after a traffic stop in Columbia.

Boone County Sheriff Sgt. Scott White says the confrontation began Wednesday afternoon when Columbia police pulled over a car.

White said two females got out of the vehicle and police fired at the car after they heard a gunshot.

He says investigators are trying to determine whether officers shot the man or if he suffered a self-inflicted gunshot wound.

No officers were injured.

White did not release the names or ages of anyone involved.

The Columbia police department asked the patrol to conduct the investigation.