SEOUL—Just days before the Winter Olympics begin in South Korea, officials in Seoul have acknowledged that there are two North Koreans who have been in the country for eight days, and that they don’t have a formal Olympic accreditation to be here.

The two North Korean men are residing in a sports complex 50 miles south of Seoul, where a joint team of North and South Korean ice-hockey players are training under head coach Sarah Murray, according to a South Korean hockey official.

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