Olympic and world silver medal-winning race walker Koki Ikeda has been provisionally suspended for doping, the Athletics Integrity Unit has announced.

Ikeda placed second in the 20-kilometre event at the Tokyo Games three years ago and at the World Championships in Eugene in 2022. He finished seventh in Paris.

The AIU said Ikeda's case was related to readings from the Japanese athlete's biological passport.

It was not immediately clear when the case would move forward.

The AIU did not immediately respond to a request for details.