"Due to the presumption of innocence, the IOC will not comment on any individual case," the IOC said.
The IOC will wait for word from the national Olympic bodies before holding any disciplinary hearings. Athletes found guilty of doping face being disqualified from the Olympics and stripped of any medals they won.
In the meantime, national and international bodies are free to impose provisional suspensions of athletes, the IOC said.
The Italian Olympic Committee said its athlete had been informed along with the committee's anti-doping prosecutor. Italian officials said they had not been authorized by the IOC to identify the athlete.
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