Chunk, a towering brown bear with a broken jaw, has swept the competition in the popular Fat Bear Week contest in the United States, his first win after narrowly finishing in second place three previous years.

The annual online competition allows viewers to follow 12 bears in Alaska's Katmai National Park and Preserve on live webcams and cast ballots in a bracket-style, single-elimination tournament that lasts one week.

Chunk - known officially as Bear 32 - beat out Bear 856, who doesn't have a nickname, in the final bracket, according to totals posted on the organisers' website .

Chunk's weight was estimated at 540kg by contest organisers. While they do not weigh individual bears during the contest because of safety concerns, Chunk and others have had their density scanned to bolster

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