South Korea's anti-corruption agency that is leading a criminal investigation into impeached President Yoon Suk Yeol's short-lived declaration of martial law said on Thursday it will transfer the case to the prosecutors' office for an indictment.

South Korean President Yoon Suk Yeol appeared in a Seoul court for his impeachment trial Tuesday, defending his short-lived martial law bid and denying charges that he ordered the military to drag lawmakers away.

South Korea's impeached president, Yoon Suk Yeol, was formally arrested early Sunday, days after being apprehended at his presidential compound in Seoul, as he faces possible imprisonment over his ill-fated declaration of martial law last month.