A pack of wolves mauled a Swedish zoo worker to death on Monday after she entered their enclosure for a routine check. The Kolmarden Wildlife Park employee, who has not been identified, was found dead by her colleagues, and officials were forced to make a human chain in order to recover her remains. It's unclear what led the animals to attack the 30-year-old woman, who had raised them since they were pups, Swedish public radio reported. "It's very unusual for something like this to happen, but it has happened before," said Olof Liberg, a wolf behavior researcher from Sweden's University of Agricultural Sciences. The zoo's wolf enclosure is famous for allowing visitors in to pet the animals.
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