KUALA LUMPUR, Malaysia (AP) — The IOC will take action against any Olympic athletes if they are found guilty of the latest doping allegations rocking the sport of track and field, IOC President Thomas Bach said Monday.

Bach said it is up to the World Anti-Doping Agency to investigate the allegations, including that one-third of medals in endurance races at the Olympics and world championships from 2001 to 2012 were won by athletes who recorded suspicious blood tests.

"If there should be cases involving results at Olympic Games, the IOC will react with zero tolerance with our usual policy," Bach said.

German broadcaster ARD and The Sunday Times newspaper in Britain said they obtained access to the results of 12,000 blood tests involving 5,000 athletes. The leaked files came from the database of the International Association of Athletics Federations.

The report said 800 athletes, competing in disciplines ranging from the 800 meters to the marathon, registered blood values that are considered suspicious under WADA standards.

The report found that 146 medals — including 55 golds — in those disciplines at the Olympics and world championships were won by athletes who have recorded suspicious tests.

The Sunday Times also said that 10 medals at the 2012 London Olympics were won by athletes with suspicious results, and that in some finals every athlete in the medal positions had recorded a dubious blood test.

The International Olympic Committee has previously stripped medals from athletes who have retroactively been found guilty of doping offenses dating back to the time of the games. The IOC also stores Olympic doping samples for 10 years for possible retesting.

"We have full confidence in the inquiry by WADA," Bach said. "If needed, we will follow suit ... and do everything to protect clean athletes."

Bach said he discussed the allegations on Monday with WADA chief Craig Reedie.

"We made it very clear and we agreed that WADA is our competence in the fight against doping and they will inquire into these allegations," Bach said at a news conference at the close of weeklong IOC meetings in Kuala Lumpur. "But at this time, we have nothing more than allegations. We have to respect the presumption of innocence of the athletes. We are looking forward to receiving the report prepared by WADA."

The IAAF and WADA were already investigating accusations made in two previous ARD documentaries of alleged systematic doping and cover-ups in Russia.

The latest ARD program, called "Doping Top Secret: The Shadowy World of Athletics," was broadcast three weeks before the world championships in Beijing, which run from Aug. 22-30.