South Korean Acting President Choi Sang-mok called for national harmony and unity and for trust in the government in a New Year's address on Tuesday, amid an unprecedented political crisis sparked by impeached President Yoon Suk Yeol's short-lived martial law declaration.

The impeachment of South Korea’s acting President Han Duck-soo has plunged the country into further political turmoil, coming less than two weeks after lawmakers impeached President Yoon Suk Yeol.

South Korea's opposition-controlled National Assembly voted to impeach acting President Han Duck-soo, further deepening the country's political crisis.