Police arrested at least 17 of the attackers. The liberal opposition party accused the president of encouraging the attack.

Hours after South Korea’s impeached President Yoon Suk Yeol was formally arrested, triggering rioting by his supporters, his lawyers said Sunday that he remains defiant in his refusal to answer questions over the probe into his declaration of martial law last month.

A South Korean court on Sunday extended President Yoon Suk Yeol's detention for up to 20 days, leading to violent protests by hundreds of angry supporters who stormed the court building, smashed windows and broke inside.