Law enforcement authorities on Friday requested a court warrant to formally arrest South Korea’s impeached president, Yoon Suk Yeol, who was in his third day at a detention center after his lawyers failed in a last-minute effort to secure his release.

South Korean investigators probing President Yoon Suk Yeol for alleged insurrection asked a Seoul court on Friday to extend his detention as the embattled leader again refused to be questioned.

Yoon Suk Yeol, who was detained for questioning over his attempt to impose martial law, would become the first sitting South Korean president to be formally arrested.

Lawyers for impeached South Korean President Yoon Suk Yeol failed in their court effort to secure his release on Thursday, a day after he was detained at his residence for questioning over rebellion allegations linked to his martial law declaration last month.

South Korean President Yoon Suk Yeol has been arrested for questioning, according to the country’s anti corruption agency, in the latest chapter of a weekslong political saga that began with the embattled president’s shock martial law decree last month.

Police stand guard outside Seoul Detention Center where impeached South Korean President Yoon Suk Yeol is held in custody, while a Pro-Yoon rally takes place outside, in Uiwang, South Korea, January 16,

South Korean authorities have arrested impeached President Yoon Suk Yeol over allegations of insurrection tied to his Dec. 3 martial law declaration, officials said.

South Korean President Yoon Suk Yeol has asked a Seoul court to review his detention as he faced renewed questioning by investigators on Thursday over his failed martial law declaration.

South Korean police detained impeached President Yoon Suk Yeol at his residence in Seoul on Wednesday local time, ABC News confirmed.