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 began a session on Friday where a vote to impeach acting President Han Duck-soo over short-lived martial law is scheduled, as the Constitutional Court said it would swiftly decide suspended President Yoon Suk Yeol's fate.

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