SEOUL—South Korea’s legislature voted to impeach acting President Han Duck-soo on Friday after he declined to make judicial appointments needed to advance the impeachment of his predecessor, extending the political upheaval that began with a short-lived martial law declaration earlier this month.

South Korea's parliament impeached acting President Han Duck-soo on Friday over a short-lived martial law, plunging the country deeper into political chaos, as the Constitutional Court said it would swiftly trial suspended President Yoon Suk Yeol.

The assembly approved the impeachment motion in a 192-0 vote on Friday. Governing party lawmakers boycotted the vote.