"We know that Western media are planning pseudo-investigations on the theme of "Russian fingerprints" in hacking attacks on information resources related to the hosting of the Winter Olympic Games in the Republic of Korea", the nation's foreign ministry warned.
Who is Kim Yo-jong?
Kim Jong-il, Kim's father, had met with two South Korean presidents in Pyongyang, the North Korean capital, before his death in 2011: with President Kim Dae-jung in 2000, and with President Roh Moo-hyun in 2007.
Pence said he and Moon spoke as "friends" and are completely aligned on the need to increase diplomatic and economic pressure on North Korea.
President Donald Trump, as well as several USA allies, have agreed to halt all military exercises until after the Olympics, Pence said.
Eager to put a reality check on the thaw in relations between the Koreas in advance of the Games, Pence met with North Korean defectors Friday and paid respects at the Cheonan Memorial in Pyeongtaek, which honors the 46 South Korean sailors killed in a 2010 torpedo attack blamed on the North. The supporters waved blue and white flags that showed an undivided Korean Peninsula.
Even though the human face appeared only briefly on TV screens, it triggered a rapid response on Twitter, with one tweet saying, "It may be considered an auspicious item in South Korea, but to be honest I was scared".
North Korea has sent a delegation of 22 athletes to compete in five disciplines, with their women's ice hockey players to compete in a unified Korean team. "The families are well connected and intensely loyal to the Kim family regime".
Moon would like to bring both North Korea and the United States to the table. It recently tested its first batch of three intercontinental ballistic missiles and its most powerful nuclear weapon to date. "With his summit proposal, he seeks to incite friction between Seoul and Washington by widening their policy gap".