Liudmyla Blonska(C) of Ukraine celebrates after women's heptathlon 800m at the National Stadium, also known as the Bird's Nest, during Beijing 2008 Olympic Games on August 16, 2008. Blonska has tested positive for banned substances at the Beijing Games.

Ukraine's Liudmyla Blonska has tested positive for banned substances at the Beijing Games, the International Olympic Committee said on Wednesday.

"The IOC is looking into the matter and the IOC disciplinary commission will hold a meeting tomorrow (on Thursday)," IOC spokeswoman Sandrine Tonge told Xinhua.

IAAF president Lamine Diack also confirmed the case.

"I have just been informed that there has been a positive case. This athlete has tested positive," Diack told a press conference.

But it was unclear for which substance the 29-year-old Ukrainian tested positive.

She finished second in the women's heptathlon behind compatriot Natalya Dobrynska on Saturday.

Blonska would be stripped of the medal and banned for life if the IOC rules she has committed an offence.

(Xinhua News Agency August 20, 2008)