South Korea's Constitutional Court on Friday removed President Yoon Suk Yeol from office over his stunning declaration of martial law in a case that ignited the worst political crisis in decades and rattled markets.

South Korea’s Constitutional Court removed impeached President Yoon Suk Yeol from office on Friday, four months after he threw South Korean politics into turmoil by declaring martial law and sending troops to parliament in an ill-fated effort to break through legislative gridlock.

Yoon Suk Yeol’s ouster triggers a snap vote within 60 days to elect a new leader who will face major challenges on trade, U.S. relations and North Korea.