Kipkorir won the Sydney Marathon in 2024 in a course record time of 2:06:18 and the Frankfurt Marathon in 2022 and 2023.

“The AIU has provisionally suspended Brimin Misoi Kipkorir (Kenya) for the Presence/Use of Prohibited Substances (EPO, Furosemide),” the AIU said in a statement.

“This sample was collected out-of-competition on November 22 2024.”

Marathon running has been hit with a spate of high-profile doping cases in recent years, particularly from powerhouse Kenya.

Kenya’s Diana Kipyokei was stripped of her 2021 Boston Marathon title for doping in 2022 and handed a six-year ban.