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

Prime Minister Han Duck-soo, who was impeached on Friday as South Korea's acting president, is a career technocrat whose wide-ranging experience and reputation for rationality failed to shield him from growing political turmoil.

South Korea's lawmakers on Friday unexpectedly voted to impeach acting President Han Duck-soo, according to South Korean news agency Yonhap.