Pyeongchang Winter Olympics suffered a cyber attack during the opening ceremony on February 9, the organisers confirmed on Sunday, but restrained to reveal the sources.
The cyber attack affected the internet-connected televisions at the media centres and also shut down the official Winter Olympics website for around 20 minutes.
However, the organisers claimed that the incident did not compromise any critical part of their operations.
"Maintaining secure operations is our purpose," The Daily Express quoted International Olympic Committee (IOC) spokesman Mark Adams as saying.
"We know the cause of the problem but these kind of issues occur frequently during the Games," Adams said.
He added, "We have decided with the IOC we are not going to reveal the source of the attack."
The 2018 Olympic Winter Games in Pyeongchang kicked off on Friday with the two Koreans marching under unified flag in an opening ceremony themed around peace and future.
The ceremony was attended by North Korean ceremonial leader Kim Yong Nam and North Korean leader Kim Jong Un's sister, Kim Yo Jong, as well as US Vice President Mike Pence.
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