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International Olympic Committee: 23 London Athletes Test Positive in Reanalysis

London Olympic Athletes' Doping Samples Test Positive 0:30

LONDON — Nearly two dozen athletes tested positive in reanalysis of their doping samples from the 2012 London Olympics.

The International Olympic Committee said Friday that 23 athletes from five sports and six countries had positive findings in retests with improved techniques on 265 samples from the London Games. The IOC did not identify the athletes, their sports or their nationalities.

"The reanalysis program is ongoing, with the possibility of more results in the coming weeks," the IOC said.

Related: IOC Chief Says Olympians Who Doped Face 'Life-Long Bans'

The 23 London athletes are in addition to the 31 who tested positive in retesting from the Beijing Olympics. The IOC said Friday that another sample from Beijing has since shown "abnormal parameters," and the case was being followed up.

Overall, up to 55 athletes from the past two Summer Olympics could be retroactively disqualified and have their results, and any medals, stripped.

The IOC stores Olympic doping samples for 10 years so they can be reanalyzed when new testing methods become available.

The current retesting program targeted athletes who could be eligible to compete at the Rio de Janeiro Olympics in August.

Take a Look Inside Rio's Anti-Doping Lab 0:51

"These reanalyses show, once again, our determination in the fight against doping," IOC President Thomas Bach said. "We want to keep the dopers away from the Olympic Games in Rio de Janeiro. This is why we are acting swiftly now."

Bach said he has appointed a disciplinary commission which "has the full power" to sanction athletes.

The IOC still has to retest the athletes' "B'' samples. Formal positive cases are not declared until the "B'' samples confirm the original findings.

The IOC said the athletes, their national Olympic committees and their international sports federations were being informed ahead of formal disciplinary proceedings.

"All athletes found to have infringed the anti-doping rules will be banned from competing at the Olympic Games" in Rio, it said.