North Korea has vowed to carry out weekly missile tests, after the US vice president warned that America’s “era of strategic patience” was over.

Han Song-Ryol, North Korea’s vice foreign minister, warned that “all out war” would result if the US took military action.

"We'll be conducting more missile tests on a weekly, monthly and yearly basis," he told the BBC.

His comments came as Mike Pence, the US vice president, arrived in Asia and visited the demilitarised zone between North and South Korea, and warned North Korea not to “test” President Donald Trump.

"Just in the past two weeks, the world witnessed the strength and resolve of our new president in actions taken in Syria and Afghanistan," said Mr Pence.