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A homeowner was shocked after coming home to a house that look as it if had been ransacked - only to discover the 'culprits' were armed police.
The man from Sacremento, USA, said the officers were originally called to his home by a neighbour who called the emergency services when he spotted the front door open.
But after realising there was no danger, the armed police officers appear to go through the house on a training exercise.
The homeowner told news station KCRA: "I thought I was robbed.