South Korea–United States relations

Satellite imagery has indicated a high level of activity at North Korea's main nuclear complex after leader Kim Jong Un ordered the production of weapons-grade nuclear material be ramped up, a US think tank said.

The influential sister of North Korea's leader warned Tuesday that her country is ready to take "quick, overwhelming action" against the United States and South Korea, a day after the U.S. flew a nuclear-capable B-52 bomber in a demonstration of strengthen against the North.

US President Joe Biden has said that the US is not discussing joint nuclear exercises with South Korea. His statement contradicted a statement by South Korean President Yoon Suk-yeol, made at a time of rising tensions with North Korea, Reuters reported, citing BTA.

South Korea reconfirmed Tuesday that Seoul and Washington are discussing its involvement in U.S. nuclear asset management in the face of intensifying North Korean nuclear threats, after President Joe Biden denied that the allies were discussing joint nuclear exercises.

The United States, Japan and South Korea warned Wednesday that a North Korean nuclear test would warrant an "unprecedentedly strong response", vowing unity after a blitz of missile launches from the hermit state.

Following talks in Tokyo, the three nations' deputy foreign ministers said they would ramp up their deterrence in the region.

North Korea's recent barrage of missile launches were tests of its tactical nuclear weapons to "hit and wipe out" potential South Korean and U.S. targets, state media reported Monday, as its leader Kim Jong Un signaled he would conduct more provocative tests.

North Korea has passed a law declaring its readiness to launch preventive nuclear strikes, including in the face of conventional attacks, state media said on Sept. 9. 

The move effectively eliminates the possibility of denuclearisation talks, with leader Kim Jong Un saying the country's status as a nuclear state was now "irreversible".

Pope Francis has asked Pyongyang to invite him to North Korea, saying in a televised interview on Friday that he would not turn down a chance to visit and work for peace.

A potential papal visit to the isolated, nuclear-armed country was previously floated in 2018 when Seoul's former president Moon Jae-in embarked on a round of diplomacy with Pyongyang's leader Kim Jong Un.

South Korean President Yoon Suk Yeol on Monday offered "audacious" economic assistance to North Korea if it abandons its nuclear weapons program while avoiding harsh criticism of the North days after it threatened "deadly" retaliation over the COVID-19 outbreak it blames on the South.

President Joe Biden's special envoy for North Korea said Friday the United States is "preparing for all contingencies" in close coordination with its South Korean and Japanese allies as it monitors North Korean arrangements for a possible nuclear test explosion that outside officials say could be imminent.