Amid reports that China was planning to conduct nuclear tests, the US in early 1960s feared that neighbouring countries like India would follow suit and it directed its officials to address India's security concerns, according to newly declassified documents.
North Korea, which this month threatened to carry out a fourth nuclear test, may be closer than previously thought to putting a nuclear warhead on a missile, some experts say, making a mockery of years of U.N. sanctions aimed at curbing such a programme.
China has used diplomatic channels to warn North Korea against conducting a fourth nuclear test, multiple China-based diplomatic sources told Reuters, after the reclusive state renewed its threat of "counter-measures" against perceived U.S. hostility.
Despite fears to the contrary, North Korea does not appear to be preparing an imminent nuclear test, a US think-tank said Wednesday in an analysis of recent satellite images of Pyongyang`s main test site.
North Korean leader Kim Jong-Un has chided his soldiers, telling them to be ready for "impending conflict with the United States," Pyongyang media reported Saturday as satellites showed a nuclear test could be near.
The United States said today it was watching North Korea "very closely" following South Korean warnings that Pyongyang may be preparing a fourth nuclear test ahead of a visit to Seoul by President Barack Obama.
Washington: A US research institute says North Korea may have temporarily shut down a plutonium reactor earlier this year as it grappled with water supply problems that could threaten the safety of its nuclear complex.