MOSCOW (AP) — The Russian skiing federation and Olympic committee could face sanctions if there are more doping cases involving the country's skiers, the head of the sport's governing body said Saturday.

"We are not happy with what is going in the Russian (ski) federation," International Ski Federation president Gian-Franco Kasper said. "A lot of changes have to be made in Russia with fighting doping."

Russian cross-country skiers Julia Chepalova, Yevgeny Dementiev, Nina Rysina and Natalia Matveeva were banned for two years after testing positive for the banned endurance-booster EPO during the last season.

Earlier this year, the International Biathlon Union suspended three Russian biathletes for two years each after they tested positive for the same substance during a World Cup event last December in Ostersund, Sweden.

"I don't believe that there's a system behind them," Kasper said. "But all the athletes used almost the same substances. So, there's something wrong."

There have been Russian doping scandals in other sports as well, with seven track and field athletes suspended last year for tampering with urine samples.

Kasper said World Anti-Doping Agency rules state that if there are several doping violations in one country "you have to take action, you have to take sanctions against the country."

"If things do not change we will have to take action against the Russian NOC or whoever is responsible," Kasper said.

Kasper praised the forming of the Russian national anti-doping agency but said that "for the time being, the results are still not there."

He called for increased testing throughout the country and for more "severe and strict" rules.

Kasper was in Moscow for the parallel slalom Champions Cup — a promotional event on a huge ramp erected at Vorobyevy Hills.