MONACO — Track and field’s Athletics Integrity Unit said Thursday that women’s marathon world record-holder Ruth Chepng'etich has been banned for three years after admitting a doping violation.

The AIU said Chepng'etich admitted to anti-doping rule violations over the presence and use of the banned diuretic hydrochlorothiazide. She had been suspended in July.

The Kenyan runner broke the world record by almost two minutes at the Chicago Marathon last year in 2 hours, 9 minutes, 56 seconds.

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