A new foundational document for relations between Russia and North Korea has been prepared, Russian President Vladimir Putin said during his state visit to North Korea on Wednesday, according to Russian state media.
During their talks in Pyongyang, Putin invited ruler Kim Jong Un to visit Russia again - this time to Moscow, after the two last met in Vladivostok in September.
The visit is Putin's first to neighbouring North Korea in 24 years.
Putin thanked his host Kim for supporting Russian policy, including in Moscow's war against Ukraine. The visit is aimed at securing further arms deliveries from Pyongyang for the war against Ukraine, observers say.
The United States accuses North Korea of supplying Russia with weapons and ammunition for the invasion.
According to the White House, the two sides agreed last year on the delivery of North Korean missiles and artillery ammunition to Russia, which Moscow uses in the war.
This is suspected to be in return for the transfer of key military technologies to Pyongyang, which is subject to international sanctions due to its nuclear programme. Both countries have denied any such cooperation.