Seven-time Tour de France champion Lance Armstrong will be denied entry to the Nice leg of the Ironman series due to an ongoing doping investigation into the American, the event organizers said on Thursday.

Armstrong (pictured), whose career has been dogged by unfounded allegations of doping, is the subject of fresh allegations by the United States Anti-Doping Agency (USADA) which could lead to the stripping of his titles.

Organizers of the Nice Ironman, to be held June 24, said through spokeswoman Delphine Vivet: "The rules governing the World Triathlon Corporation (WTC) state that no athletes under investigation can participate in the event."