As if to reinforce the need to reel in the "evil empire", Mr Pence has brought with him to South Korea the father of young American student Otto Warmbier, who was brutalised, both physically and mentally, while in a North Korean jail.
"Then and only then will the world community consider negotiating and making changes in the sanctions regime that's placed on them today", he added.
The plane carrying a high-level North Korean government delegation including leader Kim Jong-un's sister arrived in South Korea Friday to attend the opening ceremony of the Pyeongchang Winter Olympics.
Pence has repeatedly left open the possibility of an encounter at the Games, but said the US had not requested a meeting.
The Pyeongchang Olympics are the second ever to be held on the Korean Peninsula, and its first Winter Games.
Sharp enhance in experiences of sexual assault at elite US Military academy
There were 50 cases in the school year that ended last summer, compared with 26 made during the 2015-2016 school year. Across the three academies, reports of sexual assault increased 30 percent in the past school year.
He met North Korean defectors on Friday and was expected to pay tribute at a memorial for 46 South Korean sailors killed in 2010 in the sinking of a warship that Seoul blamed on a North Korean torpedo attack.
A summit now would risk driving a wedge in the alliance between South Korea and the US, which has sought to maximize pressure on North Korea to pressure Kim into giving up his nuclear weapons.
"Yesterday's display was all one more part of an ongoing provocation", Pence says.
Perhaps the most stirring moment of the evening came when the penultimate torch bearers were revealed as Chung Su-hyon, a North Korean player for the unified Korean hockey team, and Park Jong-ah, a South Korean player. During the meeting, two leaders also exchanged their views on a hot potato, the controversial agreement to settle Japan's wartime sexual enslavement of Korean women. President Moon said the atmosphere in terms of inter-Korean relations has changed dramatically since his visit to NY for the UN General Assembly and expressed his gratitude for UN's efforts to ease the tension on the Peninsula.
The decision was announced by the Court of Arbitration for Sport (CAS), just a few hours ahead of the opening ceremony of the winter games is set to begin later in the day. She will meet South Korean President Moon Jae-in at a luncheon, Moon's spokesman said Thursday.