A pack of wolves attacked and killed a worker in their enclosure at one of Sweden's most popular wildlife parks on Sunday.
Police said they did not know what had triggered the attack on the 30-year-old woman.
"She was so badly hurt in the attack that she died of her injuries," a police spokesman for the Ostergotland district, where the Kolmarden park is located, said.
"We do not know why they attacked."
Police remained on the scene to investigate the incident.
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