Pyongyang, December 20 (KCNA) -- Leader Kim Jong Il died on a train from great mental and physical strain caused by his ceaseless journey of field guidance for building a prosperous and powerful country.

He had received medical treatment for his cardiac and cerebrovascular diseases for a long period.

However, he made uninterrupted field guidance tour to provide the people with better and best things, not taking care of his health.

This year his forced march for the improvement of the people's living standard, launched at the Nampho Glass Bottle Factory, continued to the Jongbangsan Combined Foodstuff Factory in North Hwanghae Province, the Huichon Ryonha General Machinery Plant and other places non-stop.

Some days before he passed away, Kim Jong Il visited the Hana Music Information Center and the Kwangbok Area Supermarket to be opened soon, working heart and soul for the people's civilized and rich life.

Wherever he visited, he had made tireless efforts, saying it is the will and determination of the Workers' Party of Korea to provide the people with the best things.

He valued and loved the people very much and always shared woe and weal with them in the whole period of his protracted revolutionary guidance.

Recalling the feats performed by him in the ceaseless forced march for the people, the army and people of the DPRK are now replete with the resolve to overcome sorrow and display strengthen and courage to make a leap forward in building a thriving nation under the guidance of Kim Jong Un, outstanding leader of the Party, the army and the people.