His remarks came after North Korean dictator Kim Jong Un's sister, who is attending the Olympics, invited South Korea's president, Moon Jae-in, to visit Pyongyang.
They added: "Kim Yong Nam, Kim Yo Jong and President Moon Jae In and his wife all stood up to wave to the players of the north and the south".
The games have turned into an opportunity to cool tensions between the two Koreas, after initial doubt that North Korea would participate at all.
"He was going to leave immediately after taking the group photo session but President Moon urged him to "see friends" so he dropped by the reception venue briefly". Moon asked the delegation, before reporters were ushered from the room.
Kim, president of the Presidium of the Supreme People's Assembly, is leading North Korea's delegation to the Olympics.
Global alarm at the rapid advance of nuclear-armed North Korea's weapons technology rose further a year ago when the regime tested its Hwasong-15 ballistic missile theoretically capable of hitting the mainland USA, in a challenge to Washington that has threatened to "utterly destroy" the regime in the event of an attack.
"North Korea has been adamant that denuclearization is an issue between themselves and the US".
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"Unlike the United States, we do not engage in dirty and messy acts to abuse sports events like the Olympics for political purposes", the newspaper said in an article attributed to an unnamed writer.
They are scheduled to watch a concert in Seoul, performed by the visiting North Korean art troupe, together with Mr Moon.
The daughter of the country's late leader Kim Jong Il also acted as an aide to her father in his later years.
North Korea leader Kim Jong Un deployed the more than 200 women - dubbed in the Asian media as the hermetic despot's "Army of Beauties" - to be part of the nation's official delegation to the Games and cheer on their countrymen and women.
North Korea's ceremonial head of state Kim Yong Nam is a career diplomat whose unquestioning loyalty has ensured his survival for decades in the regime's top ranks.
The recent detente, anchored by South Korea's hosting of the Winter Olympic Games, came despite an acceleration in the North's weapons program a year ago and pressure from Seoul's allies in Washington.
She smiled brightly as she was greeted by South Korean officials led by Unification Minister Cho Myoung-gyon at a meeting room at Incheon International Airport.
But Schoff said that by pouring cold water on hopes for better inter-Korean relations, Pence's stance could be viewed as critical of Moon's outreach to North Korea.
He also ratcheted up his rhetoric on the North's human rights abuses in a speech to US service members at Yokota Air Base in Japan.