Vice Foreign Minister Choe Son Hui blamed top US officials for the breakdown of last month's summit in Hanoi between US President Donald Trump and North Korean leader Kim Jong-un, Russia's TASS news agency and AP said.
"We have no intention to yield to the US demands (at the Hanoi summit) in any form, nor are we willing to engage in negotiations of this kind," TASS quoted Choe as telling reporters in the North Korean capital.
US Secretary of State Mike Pompeo and national security adviser John Bolton "created the atmosphere of hostility and mistrust and, therefore, obstructed the constructive effort for negotiations between the supreme leaders of North Korea and the United States", Choe said.
Kim is set to make an official announcement soon on his position on the denuclearization talks with the United States and the North's further actions, it added, citing Choe.
Choe said Washington threw away a golden opportunity at the summit and warned that Kim might rethink a moratorium on missile launches and nuclear tests, AP said.
"I want to make it clear that the gangster-like stand of the US will eventually put the situation in danger," Choe said.
South Korea, which has an ambitious agenda of engagement with North Korea that is dependent on Pyongyang and Washington resolving at least some of their differences, said it was too early to tell what Choe's comments might mean.
The second Trump-Kim summit broke down over differences about US demands for Pyongyang to denuclearize and North Korea's demand for dramatic relief from international sanctions imposed for its nuclear and missile tests, Reuters wrote.
Choe had said after the Hanoi talks that Kim might lose his commitment to pursue a deal with the United States after seeing it reject a request to lift some sanctions in return for the North destroying its main known nuclear complex.