ST. LOUIS (AP) — Police say an officer fatally shot a suspect in an armed robbery of a St. Louis fast-food restaurant.

St. Louis Police Lt. Col. Lawrence O'Toole says a citizen flagged down an officer in a marked car Sunday evening and reported the robbery at a Kentucky Fried Chicken restaurant.

O'Toole says the officer went to the KFC and confronted the 52-year-old suspect, who raised a handgun toward the officer. O'Toole says the suspect refused orders to drop the weapon and the officer fired two shots, killing the man.

The 42-year-old officer is a 13-year veteran. He was not injured.

O'Toole says there is video from the restaurant and there were witnesses inside.

The St. Louis Post-Dispatch reports about 40 onlookers gathered at the scene after the shooting, with some chanting protests against police.