North Korea slammed US intelligence reports of weapons transfers to Russia during the war in Ukraine, stating that it has not and has no plans to do so and labelling the claims as an attempt to tarnish the hermit nation's image.
In a state media report on Thursday, an unnamed North Korean defence official told the US to stop making "reckless remarks" and to "keep its mouth shut".
Biden administration officials earlier this month confirmed a declassified US intelligence assessment that Russia was in the process of purchasing arms from North Korea, including millions of artillery shells and rockets.
Moscow has also been accused of purchasing weapons such as drones from the likes of Iran in attempts to ease severe supply shortages in Ukraine worsened by US-led export controls and sanctions.
The North Korean statement came weeks after Moscow described the US intelligence finding as "fake".
North Korean arms exports to Russia would violate United Nations resolutions banning the country from importing or exporting weapons.
The North Korean official stressed that Pyongyang has never recognised the "unlawful" UN Security Council sanctions against the country "cooked up by the US and its vassal forces".
The official said the export and import of military equipment is a "lawful right peculiar to a sovereign state", according to an English translation of the statement published by the North's official Korean Central News Agency.
"But we take this opportunity to make clear one thing. We have never exported weapons or ammunition to Russia before, and we will not plan to export them," said the official, who was described as a vice director general of the National Defence Ministry's general equipment bureau.
"It is not sure from where the rumour originated which the US is spreading, but it is aimed at tarnishing the DPRK's image," the official said.
Pyongyang uses Ukraine war to speed up its weapons development
Experts say North Korea, if willing, could become a major source of small arms, artillery and other ammunition for Russia, considering the compatibility of their defence systems based on Soviet roots.
North Korea has sought to tighten relations with Russia even as most of Europe and the West have pulled away, blaming the US for the crisis and decrying the West's "hegemonic policy" as justifying military action by Russia in Ukraine to protect itself.
The North Korean government has even hinted it is interested in sending construction workers to help rebuild pro-Russia breakaway regions in Ukraine's east.
In July, North Korea became the only nation aside from Russia and Syria to recognise the independence of the Moscow-controlled territories in the eastern Donbas region, the so-called Donetsk and Luhansk people's republics.
North Korea also used the war as a window to accelerate its own arms development, testing dozens of weapons, including its first long-range missiles since 2017, thus exploiting a divide in the UN Security Council, where Russia and China have blocked Washington's attempts to tighten sanctions on Pyongyang.
The North has punctuated its testing activity with repeated threats of nuclear conflict with Seoul and Washington.
The latest was a law passed by Pyongyang's rubber-stamp parliament this month that further enshrined the country's status as a nuclear power and authorised the preemptive use of nuclear weapons over a broad range of scenarios where its leadership comes under threat.
Sung Kim, the Biden administration's special representative for North Korea, met with South Korean counterpart Kim Gunn in Seoul on Thursday, where they expressed "serious concern" over the North's escalating nuclear doctrine spelt out in the new law, South Korea's Foreign Ministry said.
The diplomats reaffirmed Washington's commitment to defend South Korea in the event of a nuclear war with the full range of its military capabilities, including nuclear.
The allies also maintained their months-old assessment that North Korea is gearing up to conduct its first nuclear test since 2017 and discussed "stern" countermeasures to such an action, the ministry said.