The White House did not say whether it will offer concessions to get North Korea to return to talks.
U.S. President Joe Biden's recent speech, newly completed policy review, and his administration's comments on human rights show he is intent on maintaining a hostile policy toward North Korea, North Korea's Foreign Ministry said on Sunday.
"Now that the keynote of the USA new DPRK policy has become clear, we will be compelled to press for corresponding measures, and with time the USA will find itself in a very grave situation", the statement reportedly said.
Trump's two-term predecessor President Barack Obama, with Biden as vice president, chose "strategic patience", waiting for North Korea to take the initiative on denuclearization.
"His statement clearly reflects his intent to keep enforcing the hostile policy towards the DPRK [North Korea] as it had been done by the US for over half a century", said Kwon Jong-gun, of the Department of US Affairs of the Foreign Ministry.
A handout photo provided by Dong-A Ilbo of North Korean leader Kim Jong Un and U.S. President Donald Trump inside the demilitarized zone (DMZ) separating the South and North Korea on June 30, 2019 in Panmunjom, South Korea.
Shortly before Mr Biden came to office, Mr Kim gave a speech in which he described the United States as his country's "biggest enemy" and announced ambitions to expand his nuclear arsenal.
As part of the administration's review of North Korea policy, Biden's team consulted with predecessors from previous administrations as well as South Korean and Japanese counterparts, according to Psaki. Pyongyang wants the United States and its allies to lift economic sanctions imposed over its weapons programs.
Last year, North Korea blew up an inter-Korean liaison office in Kaesong, North Korea, after Kim Yo Jong led a campaign of criticism over the leaflet launches.
The group "flew 500,000 leaflets, 500 books and $5,000 (RM 20,000) in cash bills distributed between a total of 10 large balloons over two occasions near the DMZ between April 25 and 29", said its chairman Park Sang-hak.
A separate foreign ministry statement said previous comments criticising North Korea's human rights situation insulted the dignity of leader Kim Jong-un and showed the United States is "girding itself up for an all-out showdown". Cha Duck Chul, a deputy spokesman at Seoul's Unification Ministry, said the government would handle the case in line with the objective of the law, though police and military authorities were still working to confirm Park's statement.
The South Korean parliament rapidly passed a law criminalising sending leaflets and USB drives - a favoured method of distributing information and entertainment.
The new policy approach is timely, as Biden is set to welcome South Korean President Moon Jae-in to the White House on May 21 to highlight their "ironclad alliance", the White House says.