Prosecutors investigating corruption allegations surrounding the Wirye and Daejang-dong development projects launched a raid of locations linked to another project in Baekhyeon-dong in Seongnam, Gyeonggi Province.

The Seoul Central District Prosecutors' Office on Tuesday sent prosecutors and investigators to Seongnam City Hall, the Seongnam Development Corporation and private real estate development company Asia Developer to obtain evidence.

Around 40 locations are being searched, including the residences of two close associates of main opposition Democratic Party(DP) leader Lee Jae-myung, former Korea Housing Technology chief Kim In-seop and the head of Asia Developer, identified by the surname Jeong.

The prosecution suspects that the Seongnam city government granted administrative favors to Asia Developer in 2015, which took the lead on a high-profile apartment project in the city's Baekhyeon-dong area.

The raid comes as the DP chief was summoned for a second round of questioning by the prosecution over his alleged role in the development projects while mayor of the city.