South Korean investigators said Monday they are seeking an overseas travel ban on President Yoon Suk Yeol as they expand a probe into possible rebellion charges over his brief imposition of martial law last week.

President Yoon Suk Yeol plunged the East Asian democracy into chaos last week with his short-lived martial law declaration.

Mr Yoon issued an apology over his martial law decree, and claimed that he would not shirk legal or political responsibility for the decision. He said he would leave it to his party to chart a course through the country’s political turmoil, “including matters related to my term in office”.