North Korea’s state media has said Donald Trump deserves the death penalty for insulting the country's leader Kim Jong-un

An editorial in the ruling party newspaper, Rodong Sinmun, focused its anger on US President's visit to South Korea last week, during which he denounced the North's "cruel dictatorship" in a speech to legislators in Seoul.

The visit was part of a marathon five-nation Asia tour by Mr Trump aimed largely at galvanising regional opposition to North Korea's nuclear weapons ambitions.

“The worst crime for which he can never be pardoned is that he dared [to] malignantly hurt the dignity of the supreme leadership,” the editorial said.

“He should know that he is just a hideous criminal sentenced to death by the Korean people,” it added.