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      Pellet gun killed wolf that fled Isle Royale park

      Federal officials say a wolf that fled from Isle Royale National Park and was found dead on the Minnesota mainland had been shot with a pellet gun.

      Park officials said Friday the 5-year-old female was shot in the chest with a lightweight pellet.

      A necropsy was conducted by pathologists with the Colorado State Veterinary Diagnostic Laboratory and National Park Service veterinarians.

      There was no immediate word on who might have shot the wolf, named "Isabelle" by researchers.

      Michigan Technological University scientists who study the park's wolves and moose say Isabelle was a loner and had been attacked by other wolves before escaping this winter across a Lake Superior ice bridge.

      Her body was found Feb. 8. Scientists said initially there were no visible signs that she had been shot.