Some two dozen additional athletes could be barred from the Summer Olympics in Rio de Janeiro, the International Olympic Committee said Friday. Officials announced that those 23 Olympians, who competed in five sports at the last Summer Games, in 2012 in London, were newly suspected of having doped.
The I.O.C. retested 265 doping samples from London using new scientific methods, it said Friday, discovering possible evidence of past drug use by athletes who could compete in Rio in 10 weeks. The I.O.C. said it could not immediately identify the implicated athletes for legal reasons and was in the process of informing the athletes and the six national Olympic committees to which they belonged.