The 2018 Winter Olympic Games officially kicked off with an opening ceremony taking place in South Korean city of Pyeongchang on Friday.
Some visitors of the event were unable to print their tickets in advance as the attack forced the organizers to shut down the website of the Games to prevent further damage, the Yonhap news agency reported.
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The website resumed its operation around 8:00 a.m. local time (23:00 GMT, Friday).