South Korea’s impeached President Yoon Suk Yeol was formally arrested early on Sunday, days after being apprehended at his presidential compound in Seoul. He faces possible imprisonment over his ill-fated declaration of martial law last month.

Impeached South Korean President Yoon Suk Yeol was arrested following a court ruling on allegations of rebellion tied to his December 3 martial law declaration, which caused the nation’s gravest political crisis in decades. Yoon’s supporters clashed with police outside the Seoul courthouse, leading to dozens of arrests and property damage.