The additional positive samples bring the number of athletes who have failed tests to 98.
Continued retesting of samples from the 2008 and 2012 Olympics has revealed 45 more cases of athletes who were doping during the Games, the IOC announced on Friday, according to the Associated Press.
The additional positive samples bring the number of athletes who have failed retests to 98.
Fifteen of the new positive tests were from the London Olympics and 30 were from Beijing, 23 of which belonged to medalists.
The IOC retests doping samples as new technology becomes available, and it has targeted athletes planning to compete in the 2016 Games in Rio de Janeiro in the latest round of retesting.
“All athletes found to have infringed the anti-doping rules will be banned from competing” in Rio, the IOC said, though it did not provide names of the athletes connected with the failed tests.
The Russian track and field team is banned from competing in the Rio Games after being denied its appeal for reinstatement on Thursday. The IAAF banned the Russian team in response to allegations of widespread doping and coverups by the country, and the Court of Arbitration for sport upheld the ban.
WADA has recommended that the IOC ban all Russian athletes from competing in this year’s Games, but no decision on that recommendation has yet been reached.