North Korea has previously denied having any “arms dealings” with Russia, however, the US has imposed sanctions on three entities it accused of being tied to arms deals between the two countries.
Kim Jong Un could travel to Russia to meet president Vladimir Putin, according to a US official.
The North Korean leader could make the trip as early as this month, according to the unnamed source, with the port city of Vladivostok, near to the border between the two countries, believed to be a possible meeting point.
It comes as the US claims the Kremlin is attempting to acquire military equipment for its war in Ukraine.
National Security Council spokeswoman Adrienne Watson said on Monday that Russian defence minister Sergei Shoigu had travelled to North Korea’s capital of Pyongyang last month.
It is believed Mr Shoigu attempted to persuade North Korea – one of the most militarised countries in the world – to sell artillery ammunition to Russia.
Ms Watson said: “We have information that Kim Jong Un expects these discussions to continue, to include leader-level diplomatic engagement in Russia.”
She added that the US is urging North Korea “to cease its arms negotiations with Russia and abide by the public commitments that Pyongyang has made to not provide or sell arms to Russia”.
It comes after Mr Shoigu also said on Monday that Russia and North Korea may hold joint war games.
“Why not, these are our neighbours,” Russia’s Interfax news agency quoted Mr Shoigu as saying.
“There’s an old Russian saying: ‘You don’t choose your neighbours, and it’s better to live with your neighbours in peace and harmony’.”
When asked about the possibility of joint exercises between the two countries, he said they were “of course” being discussed, the agency said.
North Korea has previously denied having any “arms dealings” with Russia, however, the US has imposed sanctions on three entities it accused of being tied to arms deals between the two countries.