The IOC says more than 2,000 drug tests have been conducted so far at the Olympics, with no positive cases as yet reported.
IOC spokesman Mark Adams says 2,097 doping controls have been carried out since the opening of the athletes village.
The number includes 1,775 urine tests, 201 biological passport checks and 121 blood controls.
Overall, the IOC plans to conduct more than 5,000 doping tests during the games.
Any positive tests will be dealt with by a special division of the Court of Arbitration for Sport.
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