South Korea's impeached President Yoon Suk Yeol had his mug shot taken and underwent a physical check before spending his first night in jail as a criminal suspect, a prison officer said Monday.

South Korea's impeached President Yoon Suk Yeol refused on Monday to be questioned by investigators under a probe into whether he committed insurrection, as dozens of his supporters faced being charged over a violent rampage on a court building.

South Korean court orders formal arrest of impeached President Yoon Suk Yeol over his short-lived martial law decree.