Tensions have been high on the peninsula since past year when the North staged its sixth and most powerful nuclear blast and test-fired intercontinental ballistic missiles (ICBMS) capable of reaching the USA mainland.
"As we speak, an estimated 100,000 North Korean citizens labour in modern-day gulags", Pence said.
Iran had summoned South Korea's ambassador to the Foreign Ministry over the apparent snub and demanded an apology from Samsung, saying that its trade relations with Iran would otherwise be "greatly affected".
Earlier on Friday, Mr. Pence said Mr. Moon gave his backing to additional measures the United States is planning to try to curb North Korea's missile and nuclear programmes, speaking after paying tribute at a South Korean memorial.
Pence has brought to South Korea as a guest Fred Warmbier, the father of a young American who died after being released from prison in North Korea. The North Koreans were in the room at the same time as Pence, an official said.
"The Korean government is basically in close consultation with the worldwide community including the United States, when necessary, in accordance with the basic principle that North Korea's participation in the Pyeongchang Winter Olympic Games should not cause controversy related to global sanctions against North Korea", South Korean Foreign Ministry spokesman Noh Ku-duk said Tuesday, according to Voice of America.
That continued state of high tension stood at odds with the optimism of International Olympic Committee president Thomas Bach, who cheered the joint entry of Korean athletes to the opening ceremony as "a powerful message of peace to the world".
International Olympic Committee president Thomas Bach addressed the stadium, calling on all at the Games to take inspiration from what they had just witnessed. North Korean leader Kim Jong-un's influential sister attended today's opening ceremony and shook hands with South Korean leader Moon Jae-in; the pair are scheduled to have lunch together.
Kim Yong Nam on Friday took a picture with Moon and his wife Kim Jung-sook before entering the reception room. The Guardian said she was keeping her brother company at the time during elections for North Korea's Supreme People's Assembly.
However, Dr. Zhiqun Zhu, a Bucknell University professor, said to not be fooled by appearances during the games in PyeongChang, South Korea.
Her visit is being seen as a sign that Kim Jong-un is serious about improving ties with the South, the BBC's South Korea correspondent Laura Bicker reports. By some accounts it will be the coldest Winter Games since 1994. Luge athlete Erin Hamlin waved the flag with gusto, enjoying a moment that generated controversy earlier Friday when US speedskater Shani Davis complained that he wasn't chosen. Moon asked him to greet the other dignitaries at the event and Pence did, shaking the hands of everyone at the VIP table except for Kim Yong-nam.
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