SEOUL, Dec. 16 (Yonhap) -- A media executive's bombshell allegation about the state surveillance of senior judicial officials was based on documents written by South Korea's top spy agency, government sources said Friday.
Cho Han-gyu, former president of the local daily Segye Ilbo, claimed during a parliamentary panel on Thursday that the Park Geun-hye administration carried out illegal surveillance of senior judicial officials including Supreme Court chief justice Yang Seung-tae.
On Friday, the presidential office denied the allegations as groundless.
The sources, however, said the documents revealed by Cho carried watermarks used at only a limited number of state organizations, including the National Intelligence Service.
The testimony came during the parliamentary hearing on corruption involving President Park Geun-hye and her confidante Choi Soon-sil.
In 2014, the newspaper first reported on the allegations of the president's once-powerful former aide Chung Yun-hoi meddling in state affairs based on a set of presidential documents it had secured during its news coverage. Cho cited some of the unreported documents to back his claim about the illicit surveillance.
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