Newstapa-Korea Center for Investigative Journalism(KCIJ) exposed the National Intelligence Service(NIS), South Korea’s spy agency, illegally did political campaigning and manipulated public opinion on social media during presidential election in 2012.

Newstapa found out that the spy agency had formed secretive cyber psychological warfare unit to create at least 660 Twitter accounts. Those account holders posted or re-tweeted 280,000 tweets usually criticizing the opposition candidates for helping the ruling party candidate, the Newstapa found.

※ English subtitles were provided via YouTube.