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( CNN) The International Olympic Committee will not issue a blanket forbidding on Russian athletes hoping to compete in the 2016 Olympic Game and will instead leave the decision on competitors’ eligibility up to their respective sport federations, the IOC said in a statement Sunday.

A damning World Anti Doping Agency( WADA) report released last week alleged a complex system of subterfuge that involved Russia’s security services tampering with and altering sealed urine samples.

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