(CBS NEWS) -- A suspected serial platypus killer is on the loose, with reports of at least three slain animals -- two of which were decapitated -- in the past five weeks.

The three platypuses were found dead in Australia’s Albury Botanic Gardens, which says it attracts more than 300,000 visitors a year.

“The animals appear to have been deliberately killed in an horrific act of cruelty,” the Wildlife Information, Rescue and Education Service (WIRES), an organization in Australia, said in a statement Wednesday.

Wildlife officials believe the animals, who most likely lived at a platypus habitat a quarter of a mile from the botanic gardens, had been caught in a trap in a nearby river before being dumped in the park. 

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