North Korea's claim that "not a single person" in the country has been infected with the coronavirus is facing growing scepticism.

It has credited strict containment measures and the shutting down of its borders for this success.

But the top US military commander in South Korea has said this is "untrue", calling it an "impossible claim".

A North Korean expert told the BBC it was likely there were cases but unlikely a mass outbreak had happened.

There are currently more than one million coronavirus cases across the world and more than 53,000 deaths.