One person was killed and at least 12 others were injured in a mass shooting at a party in Oklahoma City on Saturday morning, according to reports.

Oklahoma City police said the shooting occurred after an argument broke out between two groups of people at Patty’s Event Center around 12:30 p.m. Shots were fired both inside and outside the building, police said.

One man was pronounced dead and twelve others were injured. Two were taken to hospital and are in critical condition, while the remainder are believed to have suffered minor injuries.

Several suspects were arrested for questioning. It is unknown how many people were at the party at the time of the shooting.

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