An Alabama police officer has shot and killed an 18-year-old man during a traffic stop.

Mobile Police Chief James Barber tells media outlets that an officer saw a vehicle cut off another car Monday evening. The officer stopped the vehicle, carrying driver Michael Moore and two passengers.

Barber says Moore had no driver's license and was asked to step out of the car. At that point, police say the officer noticed that Moore had a gun in his waistband and reached for it.

Barber says the officer shot Moore four times. He was later pronounced dead at USA Medical Center.

Barber says investigators recovered a semi-automatic .40-caliber Smith and Wesson and a magazine from the scene.

The officer involved has been placed on administrative duty pending results of the investigation.