SEOUL, Oct. 31 -- Kim Jong Un, top leader of the Democratic People's Republic of Korea (DPRK), sent his condolence message to South Korean President Moon Jae-in over the death of Moon's mother, Kang Han-ok, the presidential Blue House of South Korea said Thursday.

The condolence letter was sent through the inter-Korean truce village of Panmunjom Wednesday afternoon, and it was directly delivered to President Moon who had stayed at a Catholic Cathedral in the country's southeastern port city of Busan for the funeral service.

With the letter, Kim expressed his deep condolence and mourning for the death of Moon's mother.

The 92-year-old Kang died of a chronic illness on Tuesday.