The World Anti-Doping Agency (WADA) has denied accusations of a cover-up in its investigation into Chinese swimmers testing positive for a banned heart drug. WADA President Witold Banka stated that the agency followed due process and investigated all lines of inquiry thoroughly. He also questioned the motives of USADA head Travis Tygart, who criticized WADA and the Chinese anti-doping body for allegedly suppressing positive tests. China has called the reports “fake news” and maintains that its swimmers ingested the drug unknowingly through contamination.