A group of people had no option but to sit perfectly still as a grizzly bear charged over to them, before circling their camp and coming in for a closer inspection.

The encounter happened as the sightseers visited the Katmai National Park in Alaska as part of a trip to observe the animals.

They were told they would be watching a group of grizzlies ‘from a safe distance’ as the bears fished in a river.

However they were stunned when one of them broke loose and charged at them along the water’s edge.

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