The statement said that the IS made no scruple of perpetrating illegal acts such as misleading public opinion, keeping in touch with the cyber command of the army and the team for cyber election campaign of the "Saenuri Party".

Detailed facts about the IS illegal interference in the past "presidential election" were brought to light, the statement noted.

It added that despite all these illegal acts, the "government" is keen to cover up its crimes.

The statement deplored south Korean society is returning to the era of the "yusin" dictatorship when the intelligence agency controlled all power organs.

The ruling forces' illegal interference in the election and their attempt to cover it up go to prove that the present "government" grabbed power by dint of injustice and lies, it charged.

The statement urged the Park regime to thoroughly probe the truth about the IS interference in the election and apologize for it.