North Korean leader Kim Jong-un and Russian President Vladimir Putin have reportedly exchanged messages to mark the anniversary of the liberation of the Korean Peninsula from Japan's colonial rule and stressed the friendly relations of their nations.

According to the North's official Korean Central News Agency, in a message sent to Putin on Sunday, Kim said that the friendly relations forged in blood in the struggle against their common enemy of Japan have sustained for years in spite of all historical challenges.

Kim then expressed his firm belief that friendly and cooperative relations will grow stronger to a new strategic level according to an agreement reached at the 2019 meeting in Vladivostok, referring to the summit with Putin in the Russian city.

In a message sent to Kim on the same day, Putin reportedly said that the great tradition of friendly relations cemented during the grave period is providing a solid foundation for developing the bilateral relations of North Korea and Russia.

He also said that the implementation of the agreements reaches in the 2019 meeting will further promote the bilateral cooperation of mutual benefits.