Vadim Devyatovskiy and Ivan Tsikhan, who finished second and third in Beijing, are being investigated for doping offenses at the Games by the International Olympic Committee and risk being stripped of their medals.

"Listen, they were tested and it was positive. They were tested for the 'A' and 'B' sample," IAAF President Lamine Diack told The Associated Press.

The substance showing in the samples taken in Beijing was testosterone, said another IAAF official who spoke on condition of anonymity because the IOC investigation was still ongoing.

"For the IAAF it is clear. It will be a suspension," Diack said at the end of the Golden League competition in Brussels. "Now it goes to the level of the IOC but for us, it is clear."

The Belarus Athletics Federation said earlier this week that both Devyatovskiy and Tsikhan deny the accusations.

The IOC is expected to rule on the case later this month, and if it follows the IAAF conclusions, it would make for the biggest doping scandal at the track competition in Beijing.

The two Belarusians would become the second and third track and field medallists to be stripped of their medals. "The IOC will still wait some time before taking its decision," said Diack.

During the Games, Ukrainian Heptathlete Lyudmila Blonska was disqualified and had to give up her silver medal for testing positive. She was given a life ban since it was her second doping offence.

Devyatovskiy's silver would go to Krisztian Pars of Hungary, while Tsikhan's bronze would go to Koji Murofushi of Japan. Primoz Kozmus of Slovenia won the gold medal.

The 31-year-old Devyatovskiy faces a lifetime ban if found guilty of a second doping offense. He served a two-year drug suspension from 2000-02.

It would be a first offence for the 32-year-old Tsikhan, a three-time world champion and silver medallist at the 2004 Athens Olympics.