The reclusive state took steps such as dismantling its nuclear test site even before the unprecedented North Korea-U.S. summit on June 12, but the two sides have still failed to decide any timeline for Pyongyang to give up its existing nukes.
The statement, credited to North Korea's Foreign Ministry, notably did not blame Trump but singled out "some high-level officials within the USA administration" who it said were going against the President's will.
The statement was also published by KCNA.
Still, North Korea said it remains steadfast in its commitment to building trust and implementing in good faith the joint statement step by step.
Bolton is a longtime Korea hawk and had been a critic of talking with North Korea before Trump opened diplomatic relations.
Roh Suk-hwan, deputy commissioner of the Korea Customs Service, announces about North Korea coal at the government complex in Daejeon, South Korea, Friday, Aug. 10, 2018. Those followed contentious remarks last week by US Secretary of State Mike Pompeo and North Korean Foreign Minister Ri Yong-ho on the sidelines of a regional forum in Singapore. "It's just North Korea that has not taken the steps we feel are necessary to denuclearize". South Korea's presidential spokesman said last month that Seoul wants a declaration of the end of the 1950-53 war sooner than later. It is also a breach of the United Nations resolutions, which ban exports of coal and other minerals from the North to cut off an important source of foreign currency that Pyongyang needs to fund its nuclear weapons and missiles programs.
It accused USA negotiators of going against the intentions of President Donald Trump and the spirit of the summit in Singapore.
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Tim Morehouse, a resident of the complex, said he heard someone shout: "Shut up! We've lost a brother", Secord said. After calling 911, Morehouse said he looked out the window again and saw two police officers lying on the ground.
South Korea started looking into allegations of North Korean coal imports back in October and the government was criticized over how long it was taking to investigate.
Pyongyang has also stepped up its calls for a formal end to the Korean War, which some analysts believe is meant to be the first step in the North's effort to eventually see all 28,500 USA troops leave the Korean Peninsula.
North Korea has in the past expressed anger over comments made by administration officials in the media, especially Bolton.
South Korea's Presidential spokesman Kim Eui-keum said on Monday Seoul is "asking North Korea to speed up its denuclearization" and asking the United States to "show honest efforts about corresponding measures that North Korea is demanding".
Trump and Kim's historic summit led to an agreement toward the complete denuclearization of the Korean Penninsula, the report states.
USA officials have declined to comment on a report on the Vox news website on Wednesday saying that North Korea had repeatedly rejected a US proposal for it to cut its nuclear arsenal by 60 to 70 per cent within six to eight months. The joint statement released after the event, however, was vague at best and provided no clear pathway for Kim to do so.