According to the AIU, the ban follows Korir’s admission that he used a prohibited substance in violation of anti-doping regulations.
While details of the specific substance were not immediately disclosed, the governing body emphasized that the athlete’s admission was a key factor in the resolution of the case.
The five-year sanction is among the more severe penalties in athletics, reflecting the seriousness of doping offences and the commitment by authorities to uphold clean sport.
The AIU reiterated its stance that athletes must take full responsibility for any substances found in their bodies, regardless of intent.
Korir’s suspension marks a significant setback for Kenyan athletics, which has in recent years faced increased scrutiny over doping violations among its athletes.
The country has produced some of the world’s top long-distance runners, but repeated cases of banned substances have raised concerns about the integrity of the sport.
The 2021 New York Marathon victory had been a defining moment in Korir’s career, cementing his status as one of Kenya’s elite marathoners.
His win in the prestigious race earned him international recognition and placed him among the top names in long-distance running.
However, the doping admission now overshadows those achievements, with the ban effectively sidelining him during what would have been some of his peak competitive years.
Athletics observers note that a five-year suspension can be career-ending, particularly in endurance sports where longevity is limited.
The AIU has continued to intensify its anti-doping efforts, particularly targeting regions with high incidences of violations.
It has also worked closely with national federations to promote awareness and compliance with global standards.
Kenyan authorities have repeatedly pledged to address the doping challenge, introducing stricter testing regimes and educational programmes aimed at athletes and coaches.
Despite these efforts, new cases continue to emerge, highlighting the complexity of the issue.