Trump insults make rocket attack 'inevitable': N Korea

North Korea warned that US President Donald Trump's remarks against the Asian country and its leader will make the US mainland an "inevitable" target for rocket attacks.

North Korean Foreign Minister Ri Yong-ho's remarks on Saturday in a speech at the United Nations General Assembly came hours after the US flew bomber jets near North Korea.

"Through such a prolonged and arduous struggle, now we are finally only a few steps away from the final gate of completion of the state nuclear force," Ri told the annual gathering of world leaders in New York.

Trump responded on Twitter by once again insulting North Korea's leader Kim Jong-un, calling him "little rocket man" and saying him and Ri "won't be around much longer".

Just heard Foreign Minister of North Korea speak at U.N. If he echoes thoughts of Little Rocket Man, they won't be around much longer!

— Donald J. Trump (@realDonaldTrump) September 24, 2017

The US president called the North Korean leader “rocket man” and a “madman” earlier this week on Twitter.

Jong-un hit back, dubbing Trump a “mentally deranged US dotard”, who would face the “highest level of hardline measure in history”.

Trump has already started sanctioning companies and institutions that finance and facilitate trade with North Korea in an attempt to undermine the Asian country.

In response, Ri said on Saturday that "it is only a forlorn hope to consider any chance that the DPRK (Democratic People's Republic of Korea) would be shaken an inch or change its stance due to the harsher sanctions by the hostile forces."