North Korean state media has announced that Russian President Vladimir Putin is set to visit the country on Tuesday for a two-day visit, during which he is expected to hold talks with North Korean leader Kim Jong Un.

The discussions are anticipated to center on enhancing military cooperation, further solidifying their alliance amid escalating tensions with Washington.

North Korea’s official Korean Central News Agency said Monday that Putin will pay a state visit to the North on Tuesday and Wednesday at the invitation of Kim. North Korean state media didn’t immediately provide more details. Russia confirmed the visit in a simultaneous announcement.

It will be Putin’s first visit to North Korea in 24 years. The visit comes amid growing international concerns about an arms arrangement in which Pyongyang provides Moscow with badly needed munitions to fuel Putin’s war in Ukraine in exchange for economic assistance and technology transfers that would enhance the threat posed by Kim’s nuclear weapons and missile program.

Military, economic and other cooperation between North Korea and Russia have sharply increased since Kim visited the Russian Far East in September for a meeting with Putin, their first since 2019.

U.S. and South Korean officials have accused the North of providing Russia with artillery, missiles and other military equipment to help prolong its fighting in Ukraine, possibly in return for key military technologies and aid.

Both Pyongyang and Moscow have denied accusations about North Korean weapons transfers, which would be in violation of U.N. Security Council resolutions.