COPENHAGEN, Denmark (AP) — International Biathlon Union president Anders Besseberg has dismissed claims by his doping chief that he will initiate an investigation into drugs in biathlon.

Jim Carrabre, the vice president of medical issues at IBU, told Norwegian broadcaster NRK Tuesday he was going to initiate a probe into the sport, based on his suspicions of testing undertaken at the Winter Olympics in Sochi in 2014.

However, Besseberg said Carrabre had not spoken to him about his mistrust, pointing out drug testing during the summer or winter Olympics was in the hands of the International Olympic Committee and the World Anti-Doping Agency.

"Jim Carrabre has not spoken to me or the IBU board about this," Besseberg said to The Associated Press.

"I am skeptical about new revelations," he said. "I must say that I'll be very surprised if one laboratory has managed to cheat, even if they had observers on a high-level presence of WADA. It is anonymous samples and then I'm surprised if they've had such a clever system.

"I feel comfortable that we are not sitting on anything that might reveal something."

His comments are at odds with Carrabre who said "we should look back, both on what happened in Sochi and what happened around the time.

"I don't believe the Russians' test system has been efficient. All winter sports federations should carry out their own independent investigations of Sochi. It would be a mistake not to do it."

A WADA commission has accused the Russian Anti-Doping Agency of covering up cases of doping by leading Russian athletes, giving them advance knowledge of supposedly surprise tests and allowing banned athletes to continue competing.

Last year, Russia's Biathlon Union accepted a fine over three doping cases, including two that came ahead of the Games in Sochi.