Former London marathon winner Wanjiru gets four-year ban — Men’s elite winner Kenya’s Daniel Wanjiru during a press conference after winning the men’s elite race at the London marathon on April 23, 2017 in London. (Photo by Karyn Louise/NurPhoto via Getty Images)

Kenyan Daniel Wanjiru, the 2017 London Marathon winner, has been banned for four years due to an Athlete Biological Passport violation, the sport’s independent Athletics Integrity Unit (AIU) said.

Wanjiru, who has denied any wrongdoing, was provisionally suspended in April. His ban was backdated to Dec. 9, 2019, and all of the 28-year-old’s results since March 9 last year have been disqualified, the AIU said in a statement here.

He has 30 days to appeal the decision to the Court of Arbitration for Sport.

ABPs are used to monitor selected biological variables over time that indirectly reveal the effects of doping rather than attempting to detect the substance or method itself.