Canada's Penny Oleksiak has withdrawn from the upcoming world aquatics championships due to a whereabouts issue under anti-doping rules, she announced on social media Friday.

Women's marathon world record-holder Ruth Chepngetich has been suspended by the Athletics Integrity Unit for a doping violation, months after that run in Chicago.

Marathon world record holder Ruth Chepng'etich has been suspended after testing positive for a banned substance. The AIU is continuing to investigate the case.

Skepticism began immediately after Chepngetich demolished the women’s world record by nearly two minutes at the Chicago Marathon last October.

Ruth Chepngetich has been provisionally suspended by the AIU after failing a drug test. She currently holds the Marathon World Record.

Ruth Chepngetich, the world record holder in the women's marathon, was provisionally suspended after a positive doping test for a diuretic.

Marathon world record-holder Ruth Chepngetich has been provisionally suspended by the Athletics Integrity Unit (AIU) for a doping violation.

RIO DE JANEIRO (AP) — Brazilian striker Gabriel Barbosa's two-year ban in a doping rules case was annulled by the Court of Arbitration for Sport on Friday.

Penny Oleksiak, Canada's most decorated female Olympian, has pulled out of the upcoming swimming World Championships because of a probe into an alleged breach of the anti-doping code under the ...