Three people were shot and killed at a Walmart in Oklahoma, local police confirmed Monday.

The shooter was among the three killed, according to local paper the .

3 Dead in Oklahoma Walmart Shooting

Two victims were inside their car and a third was in the parking lot of the Walmart store in Duncan, Oklahoma, the Associated Press reported.

3 Dead in Oklahoma Walmart Shooting

Police are asking for any witnesses to the shooting, Duncan Police Chief Danny Ford told reporters.

3 Dead in Oklahoma Walmart Shooting

In August, a gunman killed 22 people in a busy Walmart in El Paso - a city in Texas near the border with Mexico. The shooter allegedly told police he was targeting "Mexicans" in the shooting.

In early September, Walmart said it would stop selling ammunition and hand guns and also asked customers to not carry guns inside the store, even where state law allowed it.