The Russian media is reporting the discovery of a completely new performance-enhancing drug.
Three Russian biathletes are alleged to have failed drug tests - but not for the popular blood booster EPO.
The International Baithlon Union president Anders Besseberg says he considers the discovery of a new medication as a serious breakthrough in the fight against doping.
The names of the athletes haven't been revealed because results of their B samples have yet to be released.
