South Korean opposition lawmakers said on Thursday they would vote this weekend to impeach President Yoon Suk Yeol over his botched attempt to impose martial law, while the defence minister blamed for recommending the move resigned.

Yoon’s declaration of martial law late on Tuesday sought to consolidate power, ban political activity and censor the media in Asia’s fourth-largest economy and a key US ally.

It sparked outrage in the streets and concern among South Korea’s international allies.

Lawmakers of the opposition Democratic Party planned to seek a vote in parliament to impeach Yoon at about 7 p.m. (1000 GMT) on Saturday, a party spokesperson told reporters.

“The Yoon Suk Yeol regime’s declaration of emergency martial law caused great confusion and fear among our people,” Democratic Party lawmaker Kim Seung-won told the National Assembly earlier.

Yoon’s ruling People Power Party is divided over the crisis but said it would oppose impeachment with the party in turmoil and two years left in Yoon's five-year term.

The Democratic Party needs at least eight of the 108 ruling-party lawmakers to back the bill for it to pass with a two-thirds majority in the 300-seat parliament.

Fighting for his political future, Yoon accepted the resignation of Defence Minister Kim Yong-hyun on Thursday and nominated his ambassador to Saudi Arabia, Choi Byung-hyuk, as a replacement, Yoon’s office said.

Kim had recommended Yoon declare martial law on Tuesday, according to the interior minister, a senior military official and the opposition’s filing to impeach Yoon.

Kim also ordered the deployment of troops to the parliament, Vice-Defence Minister Kim Seon-ho said, adding that he was unaware of the martial law order until Yoon declared it.

“I have fundamentally opposed the mobilisation of military forces under martial law and have expressed negative opinions about it,” Kim Seon-ho told a parliament hearing on Thursday, apologising and taking responsibility for failing to prevent it.

South Korea’s army chief has also offered to resign, the Yonhap news agency said.

The former defence minister now faces a travel ban as prosecutors investigate the attempt to impose martial law, broadcaster YTN said. Yoon and the interior minister were also being investigated, Yonhap said.

INSTABILITY ALARMS

Japanese Prime Minister Shigeru Ishiba said Japan’s “security situation may be fundamentally changed” in light of the instability in Seoul and North Korea’s rising military assertiveness.

“What will happen to South Korea? There appears to be a great deal of domestic criticism and opposition,” he told parliament, adding that Yoon’s efforts to improve relations with Tokyo “must never be undermined”.

There has been no reaction yet from North Korea to the drama in the South.

On Wednesday, Secretary of State Antony Blinken told Reuters the United States had not been made aware in advance of Yoon’s declaration, while his deputy, Kurt Campbell, said Yoon had badly misjudged it.

The United States has 28,500 troops stationed in South Korea as a legacy of the 1950-1953 Korean War.

The commander of US Forces-Korea, General Paul LaCamera, warned American troops to stay vigilant, avoid areas with protests, and tell superiors of travel plans in case “something unexpected” happens.

Yoon had been embraced by leaders in the West as a partner in the US-led effort to unify democracies against growing authoritarianism in China, Russia and elsewhere.

But he caused unease among South Koreans by branding his critics “communist totalitarian and anti-state forces”. In November, he denied wrongdoing in response to accusations of influence-peddling against him and his wife and he has taken a hard line against labour unions.