Moon Jae-in and North Korean leader Kim Jong Un pledged at a summit to end hostilities between their countries and work toward the "complete denuclearisation" of the Korean peninsula. Trump is preparing for his own summit with Kim.
Iran's armed forces spokesman said on Saturday that there can be no talks on the country's missile programme without the West's destruction of its nuclear weapons and long-range missiles.
UN Secretary General Antonio Guterres called on Monday for a new global effort to get rid of nuclear weapons but said many states still wrongly think they make the world safer.
The Pyeongchang Games have become a venue for geopolitics as much as sports as the nuclear-armed North mounts a charm offensive.
Speaking on a visit to Japan, Secretary-General Antonio Guterres said: "The worst possible thing that could happen would be for us all to sleepwalk into a war that might have very dramatic circumstances."
North Korea said it had successfully tested a powerful new intercontinental ballistic missile (ICBM) that put all of the US mainland within range, declaring it had achieved its long-held goal ...
President Donald Trump designated North Korea a state sponsor of terrorism on Monday, allowing the United States to impose additional sanctions and penalties against Pyongyang.
Donald Trump has embarked on a tour of Asia this week trying to rally regional support for curbing North Korea's nuclear weapons programme.
US President Donald Trump arrived in China on Wednesday seeking help to rein in North Korea after warning the North's leader that the nuclear weapons he is developing "are not making you safer, they are putting your regime in grave danger."
Rodrigo Duterte said he hoped that Japan, the United States, South Korea and China would consider sending a representative to sit down with Kim to avoid a nuclear war.
Vladimir Putin's comments on North Korea appeared to draw the lines for a clash at the United Nations pitting Moscow and Beijing against Washington and its allies.