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The skaters theorized the boars were apparently trying to escape from a small island on the lake after running out of food.
Jacob Konig, who recorded the video, told the Natursidan website the boars were sliding around "like Bambi on slippery ice" when the group found them.
The group said they were able to push all four boars back to the mainland. They said they used the poles because some of the boars reacted aggressively to the rescue attempts.