Denis Oswald, a senior International Olympic Committee (IOC) official who oversaw an investigation into widespread Russian doping in Sochi, says that the entourage of Russian figure skater Kamila Valieva "will be investigated" as "a girl of 15 would not do something wrong alone". Valieva is favourite to win gold in the women's singles skating, which starts on Tuesday, but the IOC confirmed there will be no medal ceremony in Beijing if she comes in the top three -- unprecedented in the history of the Games. "It would be very difficult to allocate medals based on a situation which is not final," explains Oswald. "Obviously, we have huge sympathy for all the athletes involved," adds IOC spokesperson Mark Adams. IMAGES AND SOUNDBITES