Description -- South Korea has indicted a North Korean man in connection with a plot to assault Kim Jong Nam, the eldest son of the late North Korean leader Kim Jong Il, in China.

Prosecutors in Seoul announced on Tuesday that the man had infiltrated into China as a spy for North Korea's State Security Ministry to expose defectors from the country.

They say he was ordered by the North around July 2010 to assault Kim Jong Nam, who was active mainly in China.

He was arrested after he entered South Korea in March, posing as a North Korean defector.

The prosecutors say he has admitted to plotting the attack. They indicted him on charges of violating South Korea's national security law.

According to South Korea's Yonhap news agency, the man paid a taxi driver in China to stage a hit-and-run car accident targeting Kin Jong Nam.

Kim Jong Nam once criticized the North Korean leadership for the transfer of power from Kim Jong Il to his 3rd son, Jong Un.