North Korean leader Kim Jong-un has accused the US of acting in “bad faith” during the summit earlier this year with President Donald Trump, according to the Korean Central News Agency.
He also said peace in the Korean peninsula would depend entirely on Washington.
Mr Kim made his remarks at Thursday’s summit with Russia’s President Vladimir Putin in Vladivostok.
President Putin accepted an invitation to visit North Korea, KCNA reported.
The visit would take place “at a convenient time,” the news agency added.
Kim Jong-un reportedly told Vladimir Putin that “the situation on the Korean peninsula and the region is now at a standstill and has reached a critical point”.
He warned the situation “may return to its original state as the US took an unilateral attitude in bad faith” during recent talks.
It comes a week after Pyongyang accused the US of derailing peace talks.
Negotiations between the two countries broke down during a summit in Vietnam in February, with no deal reached over North Korea’s nuclear weapons.
Those talks reportedly stalled over North Korea’s demand for full economic sanctions relief in return for some denuclearisation commitments – a deal the US was not willing to make.
During Thursday’s summit in Vladivostok, President Putin attempted to act as arbiter, saying Mr Kim needed international security guarantees if he was to end his nuclear programme.
