An independent lawmaker proposed a bill Monday to ban the presidential office from destroying its documents after impeachments, as prosecutors seek to investigate the alleged corruption scandal surrounding President Park Geun-hye.

Park was impeached earlier this month by the parliament, with the Constitutional Court currently reviewing its legitimacy.

The new bill also paves the way for investigators to secure lists and presidential documents immediately after the passage of an impeachment.

"There must be a measure to protect and preserve presidential documents after (the Constitutional Court) starts reviewing the impeachment," said Rep. Lee Chan-yeol, an independent lawmaker.

"Concerning the case of Park and her confidante Choi Soon-sil, there are allegations that presidential staffs leaked documents to other behind-the-scenes figures," Lee added. "The bill also aims to improve regulations related to the handling of such documents." (Yonhap)