Prosecutors apprehended a close aide of main opposition Democratic Party(DP) leader Lee Jae-myung on Wednesday in their investigation of alleged violation of the political fund law.

The Seoul Central District Prosecutors' Office detained Kim Yong, the deputy chief of the DP's Institute for Democracy, and raided several locations, including his residence.

Kim is suspected of having taken hundreds of millions of won from Yoo Dong-kyu, former acting president of Seongnam Development Corporation, and Nam Wook, a lawyer involved in the Gyeonggi Province land development scandal.

Yoo, who is under arrest for alleged corruption in the Daejang-dong development project, reportedly told prosecutors that he had handed over money to Kim.

The prosecution suspects that some of the money could have been illegally used in the election campaign of DP leader Lee Jae-myung.