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 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 arrest over a violent rampage on a court building.