South Korea President Yoon Defends Martial Law, Vows To Fight Until 'Very Last Minute'

South Korean President Yoon Suk Yeol vowed on Thursday to fight "until the very last minute" in a defiant address defending his shock decision to declare martial law and deploy troops to the country's parliament last week.

The South Korean leader is barred from foreign travel as part of a probe into his inner circle over the dramatic events of December 3-4 that stunned Seoul's allies and threw the country into some of its deepest political turmoil in years.

Yoon, staring down an impeachment vote in parliament on Saturday, vowed to "fight with the people until the very last minute".

He went on the attack against the opposition, accusing it of pushing the country into a "national crisis".

"The National Assembly, dominated by the large opposition party, has become a monster that destroys the constitutional order of liberal democracy," Yoon said in his televised address.

Yoon also doubled down on his justification of declaring martial law, which he had said was taken to safeguard South Korea "from the threats posed by North Korea's communist forces and eliminate anti-state elements".

"I apologise again to the people who must have been surprised and anxious due to the martial law," he added.

"Please trust me."

Saturday's impeachment vote will take place at around 5:00 pm (0800 GMT).

PPP leader Han Dong-hoon urged party members on Thursday to attend the meeting and vote "according to their conviction and conscience".

"President Yoon Suk Yeol is no longer able to fulfil his duties as president, and I think that has become clearer and clearer," he said.

The opposition formally submitted a second impeachment motion against Yoon on Thursday, following last week's failed attempt to remove him from office after ruling party lawmakers largely boycotted the vote.

The bloc needs eight MPs from the ruling party to vote in favour of the impeachment, and several ruling lawmakers have indicated their intention to do so in the next vote, scheduled for Saturday.

To impeach Yoon, two-thirds of the parliament must vote in favour.

Police meanwhile attempted another raid on Yoon's presidential office compound, Yonhap news agency reported, a day after a similar attempt was blocked by security guards.

The main opposition Democratic Party has said it would file legal complaints for insurrection against the president's staff and security if they continued to obstruct law enforcement.

Yonhap said Thursday's raid focused on the headquarters of the military's Joint Chiefs of Staff, which reportedly agreed to cooperate with the investigation.

- 'I want to witness history' -

South Korea's capital has been rocked by daily protests since last week, with thousands gathering to demand Yoon's resignation.

Kim Jae-hee, 34, told AFP she would be hitting the streets on Saturday to protest for Yoon's impeachment.

"I want to witness history," she said. "I also know a lot of friends who are doing the same."

And members of Yoon's inner circle have come under intense scrutiny for their alleged role in last week's martial law declaration.

Police said on Thursday they had raided the headquarters of the military's capital defence command, which was deployed during the martial law declaration.

Former defence minister Kim Yong-hyun, who is accused of urging Yoon to impose martial law, tried to kill himself in prison on Tuesday, authorities said.

Kim was first detained on Sunday and later formally arrested on charges of "engaging in critical duties during an insurrection" and "abuse of authority to obstruct the exercise of rights".

The former interior minister and the general in charge of the martial law operation are also barred from foreign travel.

The PPP has said that, pending Yoon's resignation, he has agreed to hand power to Prime Minister Han Duck-soo and party chief Han.

In North Korea, AFP footage showed students scrolling through photos of anti-Yoon protests posted on the website of ruling party daily the Rodong Sinmun.

Pyongyang's state media -- which has long hurled insults against Yoon -- has described the South as being in "chaos" following his decision to impose martial law.