The West risks the start of nuclear war with China or Russia due to a “breakdown of communication” with the two major powers, the United Kingdom's national security adviser has warned

Former Russian president Dmitry Medvedev has strongly warned the Western states against attempts at “punishing” the country over its ongoing military operation in neighboring Ukraine.

Russia does not intend to employ nuclear weapons in Ukraine, a Russian official says, rejecting reports by Western media suggesting the possibility of a nuclear strike by Moscow are “deliberate lies.”

The influential sister of North Korean leader Kim Jong-un has blasted South Korea for touting its pre-emptive strike capabilities, warning that her country would annihilate its neighbor if provoked.

Kremlin spokesperson says Russia's security policy dictates that the country could only use nuclear weapons if its very existence were threatened.

The US military is “filled with delusional hubris, blinding it to the actual danger of nuclear war,” according to an American journalist and political analyst.

“I don't want to believe it, and I do not believe it,” Foreign Minister Lavrov said.

Russia says Western powers have the ambitions of a nuclear war, but Moscow will press on with its military operation in Ukraine until “the end”.

A high ranking American official has accused Russia and China of posing imminent threats on the US, warning a possible nuclear war against them.

Iran’s foreign minister says Trump’s sphere of authority is a security concern for the international community.