According to the Bangkok Post, that afternoon Stefan was feeding a bear that was in its cage. He reached his arm into the cage to give the bear food. However, suddenly the wild animal bit Stefan's right hand. The animal, which was in the foundation complex located in Muang Ngai, refused to let go of the Swiss man's hand.

The condition is truly dangerous. Stefan knows his life could be threatened if his hand continues to be in the grip of the giant bear. Stefan then took emergency action. He decided to cut off his arm using a knife to avoid the bear's attack.

Stefan was immediately taken to Chiang Dao Hospital with his arm severely injured from the elbow down. The 32-year-old man was then transferred to a private hospital in Muang District, Chiang Mai, to undergo surgery.

Meanwhile, Stefan's severed arm was found in a torn condition by a bear bite that was originally intended to be fed. According to reports, the Asian black bear that attacked Stefan was initially in the Doi Pha Daeng National Park in Chiang Dao, after having previously gone missing in 2013.