Olympic champions Evgeny Ustyugov and Svetlana Sleptsova, as well as Alexander Pechenkin and Alexander Chernyshov, fell under suspicion.
Pechenkin is suspended from the competition, the rest of the athletes have already completed their careers.
The charges against biathletes were brought on the basis of the results of the athletes' analyzes and information published in the McLaren report.
It became known earlier that Christina Ilchenko can be prevented from participating in the first stage of the CM on biathlon.