Washington: South Korea's national security adviser has announced North Korean leader Kim Jong-un is committed to denuclearisation and has invited Donald Trump to a meeting, which Trump said would happen by May.

At the White House on Thursday evening, Chung Eui-yong also announced a commitment by Kim to stop North Korea's nuclear and missile testing.

Chung said that "along with President Trump" South Korea was optimistic about the prospects of denuclearisation.

It was not clear whether the Kim regime had requested any concessions for such a meeting or if there were plans for further talks to discuss details of such a plan.