Prosecutors have raided the house of a ruling Saenuri Party official as part of their widening investigation into allegations that a deceased businessman provided illegal political funds during the 2012 presidential election, a prosecution official said Friday.

Prosecutors obtained documents and computer discs from the residence of the official, only identified by his surname Kim, to corroborate a so-called "bribery list" left behind by Sung Wan-jong, who committed suicide in April, the official said.

The memo shows sums of money written next to the names of six out of eight high-profile politicians, indicating that they were bribed. The eight politicians include President Park Geun-hye's former and current chiefs of staff.

Allegations have further arisen that 200 million won ($180,000) was delivered to Kim prior to the election under the order of Sung.

Kim assumed the post of chief co-spokesman in the Park camp during the election season in 2012.

Prosecutors said they have also notified Kim to appear to face questioning later in the day. (Yonhap)