This statement came hours after President Donald Trump commented that in order to deal with this isolated country "Only One Thing Will Work".

The US President, however, didn't elaborate his remark and left it unclear what he actually meant by "giving billions of dollars", "only one thing will work". "In a Twitter message on October 7, Trump wrote, "[American] Presidents and their administrations have been talking to North Korea for 25 years, agreements made and massive amounts of money paid. hasn't worked".

Mr. Trump did not make clear what that one thing was, but it was enough to grab the attention of the Korean leader. "I think this one's the worst of the group - but they started doing what they were doing", Trump said, referring first to then North Korean leader Kim Jong-il and then his son and current leader Kim Jong-un.

Earlier this week, during a meeting with top US military leaders and their spouses, Trump told reporters it was the "calm before the storm". When asked, he simply said: "You will find out".

Trump said on Saturday he had a good relationship with Secretary of State Rex Tillerson but that Tillerson could be tougher.

North Korea fired a missile over Japan in September and tested a hydrogen bomb, prompting Trump to insist that "all options were on the table" in an implied threat of pre-emptive military action.

Trump says years of talking to the North and providing aid haven't worked. As of press time, North Korea has not responded to Trump's tweet, thought they have done so in the past. However, Trump stated that these won't work now as Kim Jong-Un has violated these agreements even before the ink ran dry. Donald Trump also added that the United States will not hold back force if needed to halt the missile and nuclear tests by North Korea.

Tensions between the USA and North Korea have been high, with several threats cast between the states.

In Pyongyang on Saturday, Kim was telling his officials that North Korea's nuclear weapons were a "powerful deterrent" and that the Workers' Party of Korea would "victoriously conclude the standoff with the U.S.".