LAUSANNE, Switzerland (AP) Swimming's world governing body, FINA, says it's surprised that three top anti-doping advisers resigned to protest their advice on Russian cases being ignored before the Rio de Janeiro Olympics.
FINA says in a statement it ''obviously regrets'' the resignations by Doping Control Review Board chairman Andrew Pipe of Canada, and two others from the eight-member panel.
Though FINA had barred seven Russian swimmers for past positive tests or links to state-backed doping, they were allowed to compete in Rio.
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Those decisions were taken by the IOC and Court of Arbitration for Sport, FINA says.
Pipe's resignation letter criticized FINA for giving ''no specific response'' when asked to explain the process, the British Press Association reported.
FINA president Julio Maglione says it strives for ''transparency and zero tolerance'' to fight doping.