A bipartisan group in Congress sent a letter Thursday to the head of the World Anti-Doping Agency criticizing that group for opening an investigation into who leaked information that led to the agency clearing 23 Chinese swimmers after they tested positive for performance enhancers before the Olympics in 2021.

“While WADA claims that their motivations are innocent, it appears this investigation’s intent is to intimidate and suppress whistleblowers,” said the letter sent to WADA president Witold Banka, a copy of which was obtained by The Associated Press. “If these allegations are accurate, WADA is not defending clean sport but is continuing to defend a cover-up.”

WADA confirmed earlier this year it had launched “Operation Puncture” to learn about the leak and what motivated it, but d

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