Tyson Gay and Asafa Powell fail drug tests

According to a report by the BBC, former world champion Tyson Gay and Jamaica's ex-100m world record holder Asafa Powell have failed drug tests.

American Gay, 30, was told by the US Anti-Doping Agency on Friday that his A sample from an out-of-competition test in May was positive.

Powell tested positive for a banned stimulant at June's Jamaican Championships.

Fellow Jamaican Sherone Simpson also failed a drug test at the same event. The sprinter, a 4x100m relay silver medallist at last year's London Olympics, tested positive for oxilofrine  - the same stimulant Powell tested positive for.

Powell and Simpson's doping positives come a month after Jamaican Olympic champion Veronica Campbell-Brown tested positive for a banned diuretic.

Powell said he had never knowingly or wilfully taken any supplements or substances that break any rules. While Gaye said, "I don't have a sabotage story... I basically put my trust in someone and was let down." 

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