His death was announced in an emotional statement read out on national television.
The announcer, wearing black, said he had died on Saturday of physical and mental over-work. Kim Jong-il was 69 and believed to have suffered ill health for many years.
The BBC’s Lucy Williamson in Seoul says his death will cause huge shock waves across North Korea.
His son Kim Jong-un has been suggested as a likely successor although nothing has yet been announced in the highly secretive state.
Desde la BBC llega la siguiente noticia, el líder de Corea del Norte ha muerto.
Habrá que estar atentos a lo que ocurra durante estos dias en Corea del Norte, a ver si sale su hijo como futuro lider o nos sorprenden con una persona ajena a la descendencia, así como atento a la posición que tomen algunos países.
Descansa en paz.