North Korean official Kim Yong-chol criticized the US president after recent remarks, confirming that Pyongyang has nothing to lose.

"Our actions have surprised him and upset him, expressed in recent remarks. This shows that Trump is an impatient old man," North Korean news agency KCNA quoted the chairman of the Commission. Asia Pacific Peace Committee (KAPPC) Kim Yong-chol today said.

North Korean officials have said North Korean leader Kim Jong-un has not used criticism against U.S. President Donald Trump, but his understanding of the White House boss may change. "The US president must understand that his deceptive style is completely meaningless and unrealistic. We have nothing to lose," Mr. Kim added.

The remarks came after Trump warned on December 8 that Kim Jong-un could "lose everything" if acting in a hostile manner and stressed that Pyongyang needs denuclearization. "He doesn't want to lose his special relationship with the US President or interfere in the presidential election in November next year," Trump wrote on Twitter.

US-North Korea relations recently showed signs of tension when Trump called Kim Jong-un a "rocket man" at a meeting with NATO leaders and implicitly warned the US that it could use force in case of need. North Korean officials have said that Kim Jong-un was "dissatisfied" with the US president's comments and warned the country would respond accordingly if Washington took military measures.

North Korean ambassador to the United Nations Kim Song said on Monday that Pyongyang no longer has nuclear talks with Washington, criticizing the Trump administration trying to "buy time" to match its domestic agenda, reiterating only Trump's re-election campaign.

The National Academy of Sciences of North Korea also announced it had conducted an important test at Sohae test site, where the country's satellite-launched rocket boosters were launched. Kim Jong-un agreed to close Sohae test ground during the first summit with Trump in Singapore in June 2018 and reiterated his commitment at the summit with South Korean President Moon Jae-in then three month.