South Korean investigators failed to detain impeached President Yoon Suk Yeol after an hours-long standoff with his security forces.

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

The danger of another declaration of martial law or military coup remains in South Korea as Yoon makes clear he intends to cling to power, emboldened by the rolling back of protests by the opposition party.