SEOUL, South Korea (AP) — A top Russian security official met with North Korean leader Kim Jong Un in Pyongyang on Friday and thanked him for the country’s support of Moscow’s war efforts in Ukraine, according to Russian state media.

North Korea is believed to be receiving economic and military assistance from Russia in return for providing weapons and troops.

North Korean leader Kim Jong Un oversaw the test-firing of the country's latest anti-aircraft missile system on Thursday, state media KCNA reported, as some experts said Pyongyang was probably getting technical help from Russia to perfect such systems.