Tensions on the Korean peninsula have eased slightly as South Korea's president says resolving Pyongyang's nuclear ambitions must be done peacefully and key US officials played down the risk of an imminent war with North Korea.
Concern that North Korea is close to achieving its goal of putting the mainland United States within range of a nuclear weapon has underpinned a spike in tensions in recent months.
US President Donald Trump warned at the weekend that the US military was "locked and loaded" if North Korea acted unwisely after threatening last week to land missiles near the US Pacific territory of Guam.
"There must be no more war on the Korean peninsula. Whatever ups and downs we face, the North Korean nuclear situation must be resolved peacefully," South Korean President Moon Jae-in told a regular meeting with senior aides and advisers.
"I am certain the United States will respond to the current situation calmly and responsibly in a stance that is equal to ours."
While backing Trump's tough talk, officials including National Security Adviser H.R. McMaster on Sunday played down the risk of the rhetoric escalating into conflict.
"I think we're not closer to war than a week ago, but we are closer to war than we were a decade ago," McMaster told ABC News' This Week.
US Central Intelligence Agency Director Mike Pompeo said North Korean leader Kim Jong-un might well conduct another missile test but talk of being on the cusp of a nuclear war was overstating the risk.
"I've seen no intelligence that would indicate that we're in that place today," Pompeo told Fox News Sunday.
North Korea reiterated its threats on Monday, with its official KCNA news agency saying "war cannot be blocked by any power if sparks fly due to a small, random incident that was unintentional".
"Any second Korean War would have no choice but to spread into a nuclear war," it said in a commentary.
South Korean Vice Defence Minister Suh Choo-suk agreed North Korea was likely to continue provocations, including nuclear tests, but did not see a big risk of the North engaging in actual military conflict.
Suh again highlighted doubts about North Korea's claims about its military capability.
"Both the United States and South Korea do not believe North Korea has yet completely gained re-entry technology in material engineering terms," Suh said in remarks televised on Sunday for a Korea Broadcasting System show.
Tuesday marks the anniversary of Japan's expulsion from the Korean peninsula, a rare holiday celebrated by both the North and the South. Moon and Kim, who has not been seen publicly for several days, are both expected to make addresses on their respective sides of the heavily militarised border.
