"As long as the U.S. denies even the basic decorum for its dialogue partner and clings to the outdated acting script which the previous administrations have all tried and failed, one can not expect any progress in the implementation" of the terms of the North Korea-U.S. joint statement, including denuclearization, a North Korean Foreign Ministry spokesperson said in an English-language statement carried by the country's official Korean Central News Agency.
The statement comes days after the United States stressed the need to keep up pressure on Pyongyang through tough sanctions imposed over its nuclear weapons programme.
"Dealing with Americans is hard, and as our main goal is total disarmament of the whole Korean Peninsula, it is necessary that the Americans also abide by their commitments but they refuse to do so".
The White House and US State Department did not immediately respond to requests for comment.More news: World Cup star cancels Gunners’ medical proposal ahead of move
"The Americans utter lovely words when negotiating and promise a very bright future but they deliver on none of their commitments when it comes to action", Larijani said.
Earlier this month, U.S. Secretary of State Mike Pompeo warned Russia, China and other countries against any violation of worldwide sanctions on North Korea that could reduce pressure on the North to abandon its nuclear weapons.
North Korean officials have toured China to discuss economic development and speculators are snapping up property along their common border.
"The U.S. should, even at this belated time, respond to our honest efforts in a corresponding manner", North Korea added in its statement. It also wasn't clear when another leaders' summit might happen.
The North noted that they returned remains of US soldiers who fought in the Korean War to the USA last week. The Korean Peninsula is still technically in a state of war because the fighting ended with a cease-fire, not a peace treaty.
The report said: "North Korea has not stopped its nuclear and missile programs and continued to defy Security Council resolutions". But across the region, there have been signs that U.S. President Donald Trump's campaign for "maximum pressure" lost steam after Pyongyang sought to improve relations with Washington, Seoul and Beijing.