Olympic and World Championships marathon champion Peres Jepchirchir has been suspended by the Athletics Integrity Unit. The suspension follows a positive test for EPO from a sample provided before her Sydney Marathon win.

The 33-year-old Kenyan athlete won the Sydney Marathon by three minutes and 40 seconds. She provided the sample in Kenya prior to the race. EPO, or erythropoietin, is a substance that increases red blood cells. Read more racing coverage.

Jepchirchir has a history of major marathon wins, including the New York, Boston, and London Marathons. She won the Olympic women's marathon in 2020 and the World Championships in 2025. Related: Kenya's Anti-Doping Reforms Under Scrutiny Ahead of 2029 World Championships.

This original Runner World brief is based on reporting from BBC Sport Athletics. Visit the source for its complete reporting, context and any later corrections.