South Korean opposition leader Lee Jae-myung said on Friday the best way to restore order in the country is to impeach President Yoon Suk Yeol, a day ahead of a planned parliamentary vote over Yoon's short-lived imposition of martial law.

Yoon's move to impose military rule on Dec. 3 was rescinded barely six hours later but it plunged the country into a constitutional crisis and widespread calls for him to step down for breaking the law.

Yoon on Thursday vowed to "fight to the end," blaming the opposition party for paralyzing the government and claiming a North Korean hack into the election commission made his party's crushing defeat in an April parliamentary election questionable.