The vote was the second major impeachment in two weeks after President Yoon’s ill-fated martial law bid set off turmoil. The country’s currency has plunged.

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.

The liberal opposition Democratic Party, which drove the legislative vote that impeached Yoon Suk Yeol on Dec. 14 over his imposition of martial law, accused the president of trying to mobilize his supporters to block his detention and called for law enforcement authorities to execute the warrant immediately.