RIOT IN CARLHAVEN.

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A riot broke out in a supermarket in Carlhaven, Nebraska, today.

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A bystander who left the scene as violence started told police that it began with a dispute over the last box of frozen Foodplace hamburger patties, but quickly escalated "For no reason at all".

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Police arrived on the scene and were quickly forced to deploy less-lethal weaponry in response to what was described by Sheriff Paul Redekopp as "A complete sh*t show".

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Seven people are dead, and another six in critical condition in Carlhaven General Hospital.