Eight female badminton competitors face a disciplinary hearing on Wednesday after being accused of throwing Olympic matches to get a more favorable draw.
The Badminton World Federation issued a statement that charged the doubles team from South Korea, Indonesia , and defending world champion China for "not using one's best efforts to win a match" and "conducting oneself in a manner that is clearly abusive or detrimental to the sport."
The doubles team and coach from South Korea has already been questioned regarding the matter.
Fans booed the accused teams when they realized that the teams were throwing matches.
The IOC has said that it will let badminton's governing body handle this matter. IOC president Jacques Rogge was present for badminton on Tuesday, but reportedly left before the matches being thrown took place.
"We have full confidence in the federation to take any necessary steps," IOC spokesman Mark Adams said. "They have the experience to deal with such issues."
Yu Yang of China claimed that she and her partner were just trying to conserve energy for the knockout stages and not intentionally trying to throw matches.
"We would try hard in every match if they were elimination games," she said. "Because they are group stage that's why we are conserving energy. If we're not playing the best it's because it doesn't matter — if we're the first or the second (in the group) we're already through. The most important thing is the elimination match tomorrow."
The accused teams could be expelled from the Olympic Games at the disciplinary hearings on Wednesday.