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YELLOWSTONE NATIONAL PARK, Wyo. -- The National Park Service says a grizzly bear charged a group of hikers in Yellowstone National Park, leaving two people injured, including one person who suffered bite and claw wounds.

Four people had hiked a few miles down a trail southwest of Canyon Village when they spotted a young grizzly bear around 11:30 Thursday morning. A sow grizzly appeared nearby and charged them.

Two of the hikers were able to use their bear spray and the sow and cub left. The encounter lasted about a minute.

All four were able to hike out to the trailhead themselves. One person was treated at the scene, while the other with the bite and claw injuries was taken to a hospital.

All four have asked that their identities not be released.

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