SEOUL, South Korea — South Korea's top university wants to interview an American researcher as part of its investigation of cloning claims made by a disgraced South Korea researcher.

A Seoul National University panel said Tuesday that to carry out "an accurate investigation," it has requested an interview with Gerald Schatten, a University of Pittsburgh researcher who co-authored the paper with Hwang Woo-suk on stem cell lines.

The university said last week that Hwang did not create any of the 11 stem cell lines as he claimed in his paper published in the prestigious journal Science.

The panel also plans to interview Park Jong-hyuk, also at Pittsburgh and another author of the 2005 paper.

"We have yet to receive responses, but expect both to agree," the university said in a statement.

Jane Duffield, spokeswoman for the University of Pittsburgh, said Myung-Hee Chung, chairman of the investigative committee at Seoul National University, e-mailed Schatten questions the panel would like answered.

Duffield said that Schatten has not responded yet because of the holidays. She said the University of Pittsburgh will not issue an official statement until its own investigatory panel's work is complete.

The Seoul university is expected to release the final results of its investigations next week. The investigations will also cover Hwang's earlier purported breakthroughs, including the world's first cloned dog.

Schatten announced in November he will no longer collaborate with Hwang because junior researchers at the Seoul lab where they did research had donated their own eggs for the study — a violation of common science ethics.

Hwang has publicly apologized for lying about the egg donations. Last month, he resigned as a professor at Seoul National University after the investigating panel concluded he deliberately faked stem cell lines.