Kim Jong-un (2nd R) looks on during the memorial for Kim Jong-il in Pyongyang, in this KCNA picture taken on December 29, 2011 and released on December 30, 2011.[Photo/Xinhua]

PYONGYANG - Kim Jong-un has become the top military commander of the Democratic People's Republic of Korea (DPRK), the official KCNA news agency reported Saturday.

A meeting of the Political Bureau of the Central Committee of the ruling Workers' Party of Korea (WPK) on Friday proclaimed that Kim assumed the supreme commandership of the Korean People's Army according to a will made by his late father Kim Jong-il on October 8, said the KCNA.

At the meeting, the Political Bureau of the WPK Central Committee adopted a document entitled "On Effecting a Great Surge in Building a Thriving Nation True to the Behests of the Great Leader Comrade Kim Jong-il," which says the army and people of the DPRK will carry forward and accomplish the cause of building a thriving socialist nation and the revolutionary cause of Juche under the leadership of Kim Jong-un, said the KCNA.

The document underlines the need to hold Kim Jong-un, the youngest son of Kim Jong-il, as "the only center of unity, cohesion and leadership of the WPK" and devotedly defend him politically and ideologically.

It calls upon all party members, the military and people to "turn sorrow into thousand-fold strength and courage" and struggle to "win a great fresh victory in the Juche revolution under the leadership of Kim Jong-un," according to the KCNA.

Kim Jong-un was named vice chairman of the Central Military Commission of the WPK last year. Kim Jong-il, who was the country's top military commander, died on December 17.

Friday's meeting discussed the joint calls of the WPK Central Committee and the Central Military Commission on marking the centenary of the birth of Kim Jong-un's grandfather, Kim Il Sung, the KCNA added.