A scientist in South Korea says one of the world's first cloned wolves has died for unknown reasons.

Seoul National University professor Shin Nam-sik says the wolf, named Snuwolf, was found dead at its zoo on Aug. 26.

Shin, who was involved in the project that produced the two first cloned wolves in 2005, said Tuesday that autopsy results will be released in about a week.

Shin said the other cloned wolf remains healthy.

Scientists at Seoul National University also created the world's first cloned dog earlier in 2005.

Their canine cloning was confirmed as genuine, but the published human stem cell work of another cloning expert at the university, Hwang Woo-suk, was later revealed as fraudulent.