DUNCAN, Oklahoma — Police have confirmed that two men and a woman have been fatally shot at a Walmart in Oklahoma.

A gunman shot and killed a man and a woman in a Walmart parking lot in Duncan, Oklahoma, on Monday morning before turning the gun on himself when an armed citizen intervened, according to the Oklahoma Highway Patrol and local media.

The Duncam police department said two men were dead, including the gunman, and a woman.

According to local media, a witness claimed that the shooter fired nine rounds, killing the two victims, and when the gunman was confronted by an armed citizen, he then turned the gun on himself. 

The man wearing all black opened fire outside the store in Duncan, a town of roughly 22,000 people about 80 miles south of Oklahoma City.

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AP