The head of Russia's security council has met North Korean leader Kim Jong Un for the second time in less than two weeks.
Sergei Shoigu previously visited Pyongyang and met Kim for talks on 21 March and 4 June this year.
The two agreed that North Korea will send 1,000 deminers and 5,000 military construction workers to Russia's Kursk region to help rebuild it after Ukraine's incursion there, Shoigu said in remarks reported by Russian state media.
Shoigu also "expressed hope" that flights between Russia and North Korea will resume for the first time in 30 years.
For context: Last year, Russia and North Korea signed a strategic partnership treaty, including a mutual defence pact.
Pyongyang has since sent thousands of soldiers to help Russia expel Ukrainian troops from its western Kursk region.
North Korea has also been accused of sending missiles, anti-tank rockets and ammunition to Russia for use in its war against Ukraine. Both Moscow and Pyongyang have denied weapons transfers.