Others chanted 'Let's tear Kim Jong-un to death!' while tearing up a picture of the North Korean leader.
Also at that game: the famed cheer squad from North Korea - more than 100 identically dressed women who sing, perform choreographed moves and cheer on their team.
Kim Yo-jong, the sister of leader Kim Jong-un, became the first member of the Kim dynasty to travel to South Korea, where she conveyed during a meeting an invitation for president Moon to meet in Pyongyang with the North Korean leader.
That is the assessment of a former South Korean government minister and political experts who say the North has used the Games to drive a wedge between South Korea and its US ally and to potentially ease pressure on its sanctions-crippled state.
Speaking to the Washington Post aboard Air Force Two on his way home from the Winter Olympics in South Korea, Pence-who avoided any direct contact with North Korean officials attending the Games-said Washington would keep up its "maximum pressure campaign" against Pyongyang but would be open to possible talks at the same time. Pence was "there to stand with Japan and South Korea", the official added when pressed on whether the vice president had intentionally dodged photo ops with Kim Yong Un's delegation. However, South Korea has been more willing to re-engage with the North than its old United States war ally, which wants Seoul to keep piling diplomatic and economic pressure on its neighbour.
Major protests have erupted in South Korea as activists burn the North's flag.
U.S. Defense Secretary Jim Mattis on Sunday rejected any suggestion that even a temporary warming of relations between the North and South could drive a wedge between Seoul and Washington. The North Korean orchestra will return home on Monday after their second and last performance on Sunday. Kim Yo Jong is 28 years old, according to the USA government.
N.Korean delegation leaves S.Korea
South Korea has strict security laws that normally ban the playing of the North's anthem and the raising of its flag. Kim Hyon-hui, a former North Korean agent responsible for the bombing of Korean Air flight 858 in 1987.
They were on both sides of the ice, chanting back and forth. Saturday's game ended in a crushing 8-0 loss to Switzerland.
"We hope that President (Moon) could leave a legacy that would last over generations by leading the way in opening a new era of unification", she said, according to Moon's office. It was the first time an inter-Korean team had competed at an Olympic Games.
Analysts say Kim Jong Un's decision to send his sister to the South reflected an eagerness to break out of diplomatic isolation by improving ties with the South, which the country could eventually use as a bridge to approach the United States.
A senior Japanese defence official said North Korea's Games charm offensive could "simply be a way to gain time" until it completed its nuclear and ballistic missile development.
She's not what we expected: not stiff, but smiling. The previous meetings came after rounds of global talks aimed at eliminating the North's nuclear program, which eventually failed.
In South Korea and beyond, commentators are taken with Kim's surprisingly stylish and relaxed demeanor. Moon replied that it was not appropriate for Abe to have raised the issue, describing it as an internal affair.
He also talked about visiting the North Korean border town of Kaesong, where the countries operated a jointly-run factory park that had been a symbol of rapprochement before South Korea shut it down in 2016, after North Korea's fourth nuclear test.