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

Impeached President Yoon Suk Yeol is facing charges of rebellion after he briefly imposed martial law in December. Supporters of the embattled politician broke into a Seoul court and broke windows and equipment.

As South Korean authorities extended President Yoon Suk Yeol's detention, his supporters stormed the courthouse that issued the warrant, smashing windows with police shields.