They marched toward Chongwadae, chanting slogans "Regime engrossed in investigation of civilians, step down!" and "Lee Myung Bak regime of dictatorship, step down!" and scattering leaflets.

The recent disclosure of the illegal investigation into civilians has brought to light the undemocratic crimes of the present regime, they said.

They would judge the present regime at any cost through the "National Assembly" election, they said, urging Lee Myung Bak to step down out of his own accord if he wants to evade the miserable end of the dictator.

The riot police took away all the demonstrators.