Pyeongchang Olympics organizers were looking into a disruption of noncritical systems on the games' opening day but could not yet confirm if it was a cyberattack, spokesman Sung Baik-you said on Saturday.
The Winter Olympics opened with a spectacular ceremony on Friday, attended by several heads of state who witnessed the joint march of North and South Korean athletes.
The ceremony was also attended by North Korean ceremonial leader Kim Yong Nam and leader Kim Jong Un's sister, Kim Yo Jong, as well as U.S. Vice President Mike Pence.