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.

Yoon on Wednesday became the country’s first sitting president to be arrested, in a criminal probe related to his short-lived declaration of martial law on Dec. 3

Police used ladders to scale barricades and enter the president’s residential compound as they try to detain Yoon Suk Yeol, who is facing insurrection charges.