South Korean President Yoon Suk Yeol is due to attend on Tuesday a Constitutional Court hearing of his impeachment trial where the detained leader may get a chance to argue his case or answer questions over his short-lived bid to impose martial law.

South Korean President Yoon Suk Yeol is expected to make his first appearance at his impeachment trial on Tuesday, with security ramped up following the Capitol Hill-like rioting during his appearance at another court at the weekend.

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.