North Korea has executed its military chief on corruption charges, a South Korean news agency said Wednesday, citing a source familiar with the nation's affairs.

The Yonhap news agency said Gen. Ri Yong-gil was executed this month. It said he was charged with, among other crimes, pursuing personal gain.

Ri was the chief of the General Staff of the Korean People's Army. He stopped appearing in public last April, North Korea watchers reported at that time. They noted that another general had replaced Ri at official functions.