Officials in an Italian region said a serial escape artist bear nicknamed Papillon once again is on the loose after breaking through the barrier of his reinforced pen.

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The bear, officially known as M49, broke free from his enclosure at a wildlife park in Castellar, Trento province, where he was housed after being recaptured from a previous escape earlier in 2020.

Papillon, named French writer Henri Charriere's autobiographical novel about his famous prison escape, had to climb three electric fences before breaking through a barrier of metal bars, officials said.

"The fence was fortified and despite that he was able to break through the very resistant fence that was partially electric, he had a desire to escape stronger than a 6,000 volt fence," a local government spokesman told CNN.

"The problem is he is too wild and has a strong instinct to return to the forest."

Officials said Papillon is outfitted with a GPS tracking collar, and the Italian Institute for Environmental Protection and Research has been notified.