SEOUL, South Korea — South Korea’s main opposition party submitted a motion on Thursday to impeach the country’s acting leader over his reluctance to fill three Constitutional Court vacancies ahead of the court’s review of rebellion charges against impeached President Yoon Suk Yeol stemming from his short-lived martial law decree on Dec. 3.

South Korea's opposition said Tuesday it would impeach acting president Han Duck-soo in protest at the interim leader's refusal to sign into law special bills to investigate his impeached predecessor.