Russian hackers leak Simone Biles and Serena Williams files

The World Anti-Doping Agency (Wada) has condemned Russian hackers for leaking confidential medical files of star US Olympic athletes. Athletes affected include tennis players Venus and Serena Williams and teenage gymnast Simone Biles. A group calling itself "Fancy Bears" claimed responsibility for the hack of a Wada database. After the leak, Ms Biles said she had long been taking medicine for Attention Deficit Hyperactivity Disorder.
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