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PHILADELPHIA (CBS) — Police have a 22-year-old man in custody after they say two men were shot and killed during an argument at a Southwest Philadelphia restaurant on Wednesday evening.

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The shooting happened inside the Bintou African & American Restaurant on Elmwood Avenue shortly after 6:15 p.m.

Police say a father and son got into a fight with two other men. They say that’s when the son opened fire, killing the two men.

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Police say an 18-year-old man suffered a single gunshot wound to the head and another man suffered multiple gunshot wounds to the head and chest. Both men were pronounced dead at the scene, according to police.

A weapon was also recovered in the shooting, police say.

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Police say the shooter did have a permit to carry.