Seoul (CNN) North Korean state media on Monday published a letter from the country's leader Kim Jong Un to South African President Cyril Ramaphosa congratulating him on Freedom Day.

CNN has no way of independently verifying the authenticity of the letter and has reported conflicting beliefs by various government officials on Kim's health condition in the past week.

The message was dated April 27, 2020, KCNA reported, as speculation mounted over Kim's health after he missed the celebration of his grandfather's birthday on April 15.

In the letter addressed to Ramaphosa, the North Korean leader expressed his certainty that the two nations' friendship would unendingly expand and develop, in addition to referencing Freedom Day, a public holiday celebrated in South Africa on Monday.

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On Sunday, South Korean presidential adviser Moon Chung-in told CNN that the North Korean leader was "alive and well" despite speculation about his wellbeing. The adviser to South Korean President Moon Jae-in said Kim had been staying in the Wonsan area on the country's east coast since April 13, adding: "No suspicious movements have so far been detected."

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