Austrian cross-country skier Johannes Duerr has been thrown out of the Sochi Winter Olympics after testing positive for EPO, in the fifth doping case of the Olympics.

"It is a black day for us," Austrian Olympic Committee President Karl Stoss said at a news conference on Sunday.

Duer tested positive on Feb. 16 in Austria where he had returned for training after finishing eighth in the men's skiathlon on Feb. 9. He had been scheduled to compete in the 50-kilometer mass start on Sunday.

"We are shocked by this announcement and took the appropriate measures right away," Stoss said in a statement.

"We've told the athlete and informed him about his rights, his accreditation has been pulled and he has been excluded from the Olympic team with immediate effect. Duerr is already on his way home."

The four other cases involved Latvian hockey player Vitalijs Pavlovs, Ukrainian cross-country skier Marina Lisogor, German biathlete Evi Sachenbacher-Stehle and Italian bobsledder William Frullani.