BEIJING -- "Gu Gu" is one of the star attractions at the Beijing Zoo but the panda bear with a bad temper has lashed out at a fan for the second time, this time mauling a 15-year-old boy.

Eight-year-old Gu Gu, who weighs 110 kilograms (242 pounds), attacked the boy after he jumped into the animal's enclosure, the Beijing News reported on Tuesday. The boy, Li Xitao, had both his legs gnawed to the bone, the paper said.

Monday's attack was not the first time Gu Gu has tasted human flesh.