US President Donald Trump said Washington and Tehran are close to a deal, claiming Iran has accepted it cannot possess nuclear weapons, while remaining disagreements focus on preventing future acquisition.

President Trump’s boasts of securing a commitment from Iranian leaders not to develop a nuclear weapon have puzzled nuclear experts who note that Tehran has made that pledge for more than 50 years.

North Korea's nuclear weapons programme is "absolutely non-negotiable", the powerful sister of leader Kim Jong Un said in a statement carried by state media on Sunday, ahead of a visit by Chinese President Xi Jinping.

“Some officials in the United States have failed to wake from their escapist and anachronistic dream,” Kim Yo Jong said.

Threats to destroy a civilization, made by the man with the sole authority to order the use of America’s nuclear arsenal, are not easily explained away as some “madman” negotiating ploy. They are more than unhinged.

KIM Jong-Un has flaunted his 5,000-tonne Kang Kyon destroyer, capable of carrying nuclear-armed strategic cruise missiles. A year passed since the warship slipped off its launch cradle prematurely

The centrifuges were still spinning. The Chinese president was on his way. And Kim Jong Un's sister had one message for the world: the bombs are not up for discussion.

The powerful sister of North Korean leader Kim Jong Un called a U.S. push for the denuclearization of North Korea an “anachronistic dream,” saying Sunday the North will steadily expand its nuclear