Mentor of N. Korea's Kim Jong Un dismissed

North Korea's army chief Ri Yong-Ho (left) attends the April 13, 2012 unveiling ceremony of statues commemorating former leaders Kim Il-Sung and Kim Jong-Il in Pyongyang, as the nation's new leader, Kim Jong-Un (right), looks on.

(AP) SEOUL, South Korea - He was the guardian figure always at the side of North Korea's young new leader. As the top army official, his experience and position lent Kim Jong Un credibility with the troops. Now, Vice Marshal Ri Yong Ho is out, dismissed from several powerful posts because of "illness," state media said Monday in a brief surprise announcement just days after he last appeared in public.

Ri did not appear ill in recent appearances, feeding speculation abroad that Kim purged him in an effort to put his own mark on the nation he inherited when father Kim Jong Il died in December. At the same time, there was no sign of discord at Ri's last public appearance at a high-level event, barely a week ago.

Still, Ri's removal, whether for health reasons or political missteps, shakes the core of the authoritarian regime's power structure and may be a sign that Kim is tensing his grip on power, just as his father and grandfather, founding leader Kim Il Sung, did in their eras.

On Tuesday morning, the official Korean Central News Agency announced that the title of vice marshal had been bestowed on Hyon Yong Chol. No other details were provided about Hyon and his military background. It was not immediately clear if he would receive any of Ri's other titles and powers, including chief of the General Staff of the Korean People's Army.

The appointment was made by the Central Military Commission of the Workers' Party of Korea and the National Defense Commission of North Korea, the agency said.

The decision to dismiss the 69-year-old Ri from top military and political posts was made at a Workers' Party meeting, convened uncharacteristically on Sunday, according to the official Korean Central News Agency. It was not immediately clear who would take Ri's place, and the dispatch did not elaborate on his condition or future.

"Whether because of a physical malady or political sin, Ri Yong Ho is out, and Pyongyang is letting the world know to not expect to hear about him anymore," said John Delury, an assistant professor at Yonsei University's Graduate School of International Studies in South Korea.

It's too early to determine "whether Ri's stepping down is a manifestation of civil-military tensions, or Kim Jong Un's attempt to consolidate control" over the army, he said.

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North Korea's political and military reshuffles are mysterious, with officials sometimes dropping out of sight without explanation. Many top North Korean officials — such as Vice Marshal Jo Myong Rok, who died of heart disease in 2010 at age 82 —stay in their posts until they die.

Perhaps, because Ri arrived on the national scene during Kim Jong Il's final years, "he was always meant to be a transitional regent figure, and his function is played," Delury said.

The dismissal comes as Kim Jong Un makes waves in other ways. State TV showed him appearing at a music concert and visiting a kindergarten recently in the company of a mysterious woman who carried herself much like a first lady. Her identity has not been revealed but her public presence was a notable change from Kim Jong Il's era, when his companions were kept out of state media.

In North Korea, the army chief has been a powerful figure since Kim Jong Il elevated the army's role when he became leader after the 1994 death of Kim Il Sung.

Kim Jong Un has upheld his father's "songun" military-first policy, but in April he also promoted younger officials with economic backgrounds to key party positions in line with his push to build up the nation's economy.

Where Ri's departure leaves North Korea's million-man army, one of the world's largest, remained unanswered.