North Korean leader Kim Jong Un sent a message of condolences to Cuba over the death of former leader Fidel Castro, highlighting the two nations' long-standing ties, the state-run Korean Central News Agency said Sunday.

Castro died Friday in Havana at the age of 90.

Cuba, which established diplomatic relations with North Korea in 1960 and maintains an embassy in Havana, has long been known as one of Pyongyang's most dependable allies. Separated by distance and culture, the two countries found common ground in their distaste for what they called America's "imperialist" foreign policy.