South Korea's parliament has impeached President Yoon Suk Yeol over his martial law decree, ending days of political paralysis.

Counting for the impeachment was delayed as ruling People's Power Party lawmakers protested after the National Assembly speaker said only a simple majority was needed in the 300-member parliament.

SEOUL—South Korea’s legislature impeached President Yoon Suk Yeol over his decision to briefly institute martial law, kick-starting a monthslong process to potentially select a new leader following one of the nation’s most tumultuous chapters in recent years.