XXX during previews ahead of the PyeongChang 2018 Winter Olympic Games at XXXX on February 6, 2018 in Pyeongchang-gun, South Korea.

A Japanese short-track speed skater Kei Saito has tested positive for doping at the Pyeongchang Olympics, the first doping case of the Games, the Court of Arbitration for Sport (CAS) said today.

The 21 year-old, failed an out-of-competition test, the anti-doping authority said in a statement, adding that he tested positive for acetalozamide, a banned diuretic which is considered as a masking agent.

According to AFP News agency, the CAS statement said the skater had left the athletes’ Olympic Village voluntarily and would be provisionally suspended from the Olympics and other competitions pending a full investigation.

Taiwan National Day Celebration