ST. LOUIS • A teen pulled a gun on the owner of a St. Louis corner store Tuesday afternoon, only to have the owner pull her own gun and shoot him.

The teenage boy entered Myrt's Northland Market at 2814 North Kingshighway with two other teens, Lt. Ken Lammert said. The owner, Myrtle Dunn, watched the teens take some potato chips and try to leave the store without paying.

Dunn demanded they return them, and two of the teens did so, Lammert said. But the third pulled a gun on Dunn.

She grabbed her own gun from beneath the counter and fired two shots at the teen, hitting him once in the buttocks, Lammert said. He ran from the store and collapsed on a nearby corner.

The teen was taken to a hospital with wounds police said were not life-threatening. Police said they will seek robbery charges against the teen.

One of the other teens was held and police said he will face a petty theft charge. The third teen got on a bus and left the area before police arrived.

Lammert said a gun was not recovered from the injured teen, but said the other teen may have taken the gun. He said it appeared Dunn's actions were justified.