Donald Trump announces sanctions on firms that do business with North Korea

Mr Trump on Thursday signed a new order boosting sanctions against North Korea, where the USA treasury would target firms and financial institutions doing business with Pyongyang.

In an unprecedented personal statement, via state media, Mr Kim said Mr Trump would "pay dearly" for his recent speech to the UN.

United States president Donald Trump has announced fresh sanctions on North Korea over its nuclear weapons programme, after promising to "totally destroy" it if it posed a threat.

South Korean TV footage also showed Ri saying he feels "sorry for his aides" when he was asked about Trump's "Rocket man" comments.

The conflict in eastern Ukraine between Kyiv's forces and Russia-backed separatists has killed more than 10,000 people since it erupted in April 2014. This would be the first above-ground test for a North Korean hydrogen bomb.

The statement was carried by the North's official Korean Central News Agency.

"We have no idea about what actions could be taken as it will be ordered by leader Kim Jong Un", he said.

Ri's comments came just hours after Kim said that Trump would "pay dearly" for threatening to "totally destroy" North Korea.

U.S. President Donald Trump speaks during a joint news conference with Finnish President Sauli Niinisto at the White House in Washington U.S

Pyongyang conducted its sixth and largest nuclear test on 3 September and has launched numerous missiles this year, including two intercontinental ballistic missiles and two other rockets that flew over Japan.

The release of Kim's statement comes after North Korea's foreign minister delivered a scornful response to Trump's threat, likening it to the sound of "a dog barking".

"The mentally deranged behavior of the US president openly expressing on the United Nations arena the unethical will to "totally destroy" a sovereign state, beyond the boundary of threats of regime change or overturn of social system, makes even those with normal thinking faculty think about discretion and composure", Kim said in a statement circulated on state news agency KCNA.

At the start of the meeting, Trump announced new sanctions that the United States would impose on companies that engage in business transactions with North Korea. "We will not seek unification by absorption or artificial means", Moon said.

In light of the threat from North Korea's nuclear and ballistic missile development, a key theme at the annual United Nations gathering, Abe said he and Trump affirmed that they will work together to call on the worldwide community to strengthen pressure on the North, including through the stringent enforcement of United Nations sanctions.

Referring to the North Korean nuclear program, Trump said "tolerance for this disgraceful practice must end now".

Chinese banks were told this week to refuse new clients from North Korea and begin winding down business with existing customers.