South Korea's main opposition party said it will introduce a bill to impeach acting President Han Duck-soo on Thursday and hold a vote on Friday, a move that could deepen the country's constitutional crisis triggered by a short-lived martial law.

South Korean investigators on Friday pressed ahead with their probe into impeached President Yoon Suk Yeol over his Dec. 3 martial law declaration, issuing another summons demanding that he appear for questioning on Christmas Day,

South Korea’s parliament voted to impeach President Yoon Suk Yeol on Saturday in an extraordinary rebuke that came about after his own ruling party turned on him following his refusal to resign over his short-lived martial law attempt.

South Korea's main opposition party threatened on Monday to impeach acting president Han Duck-soo if he failed to approve legislation to launch a special counsel investigation into President Yoon Suk Yeol's failed bid to impose martial law.

For the United States, the turmoil in South Korea is potentially disruptive to its geopolitical agenda in East Asia.

South Korea’s main opposition party has submitted a motion 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.

South Korea’s President Yoon Suk Yeol again declined to appear for questioning by investigators over his martial law declaration as the embattled leader seeks to first defend himself at an impeachment trial.

South Korean President Yoon Suk Yeol failed to appear before law enforcement authorities for questioning on Wednesday - the second time he has ignored a summons over his attempt to impose martial law.