China's star distance runner Sun Yingjie was stripped of her silver medal in the women's 10,000 meters at the ongoing National Games after she failed a doping test, organizers said here on Friday.

"Sun tested positive for the banned androsterone in the dope test conducted after the women's 10,000m final on Monday night," said Guo Jianjun, deputy secretary-general of the organizing committee of the National Games.

It is the first positive doping case reported at the Oct. 12-23 National Games.

On Monday, the 26-year-old Sun clocked 31:03.09 for the silver medal in the women's 10,000 meters, next to Xing Huina of Shandong province in 31:00.73.

Sun's result was thus nullified and she was prohibited from competing in the remaining events of the Games, organizers said. Sun of the Locomotive Sports Association originally scheduled to compete again in the women's 5,000 meters on Saturday.

Prior to the 10,000 meters, Sun timed in 2:21:01 for her third consecutive victory in the annual Beijing International Marathon on Sunday, also categorized as the marathon final of the National Games, beating compatriots Zhou Chunxiu and Sun Weiwei to second and third places in 2:21:11 and 2:27:33 respectively.

However, Sun can still keep her marathon gold medal as she passed the doping test for the Beijing event.

"Sun's urine sample taken after the Beijing International Marathon returned negative results, so she can keep her title of the marathon race," said Zhao Jian, an official of the Anti-Doping Commission of the Chinese Olympic Committee.

Sun won the bronze medal in the women's 10,000m at the World Athletics Championships in 2003.

The two doping tests are all conducted at the IOC-accredited laboratory in Beijing.

Editor: Donald