The impeachment of South Korea’s acting President Han Duck-soo has plunged the country into further political turmoil, coming less than two weeks after lawmakers impeached President Yoon Suk Yeol.

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.

The impeachment of Han Duck-soo, acting president since Yoon was impeached on Dec. 14 for declaring martial law, has thrown South Korea's once-vibrant democratic success story into uncharted territory.

South Korea's opposition said Thursday it filed an impeachment motion against acting president Han Duck-soo, in an escalating row over the composition of the Constitutional Court which would decide whether to remove his predecessor from office.

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.

South Korean authorities have granted a request to extend a warrant to detain the country’s suspended President Yoon Suk Yeol for questioning over his surprise declaration of martial law last month.

Investigators failed to take Yoon Suk Yeol into custody following a standoff with the presidential security service last week.

South Korea's main opposition party introduced a bill to impeach acting President Han Duck-soo on Thursday, a day before it plans to seek a vote on the move, which could deepen a constitutional crisis triggered by a short-lived martial law.

The president was suspended from his duties last month following a failed bid to impose martial law and his subsequent impeachment by parliament on December 14. Law enforcement authorities are seeking Yoon’s arrest as part of an investigation into alleged treason and abuse of power.

In a dramatic escalation of South Korea’s ongoing political crisis, anti-corruption investigators have sought a renewed arrest warrant for impeached President Yoon Suk Yeol, whose controversial attempt to impose martial law last month plunged the nation into turmoil.