South Korean President Yoon Suk Yeol, 64, has become the first sitting president to be arrested after investigators breached the security of his residence on Wednesday.
Yoon faces charges of insurrection linked to a failed martial law order in December that caused national unrest.
His impeachment by parliament is on hold pending a decision by the Constitutional Court.
Yoon’s arrest concluded a weeks-long standoff with authorities, who had previously failed to detain him in January.
A large team of investigators arrived at his residence equipped with ladders and tools to scale barricades and cut through barbed wire.
In a video released before his arrest, Yoon claimed the investigation was illegal but said he would cooperate to avoid violence. He remained silent during questioning.
His lawyers argue the arrest was unlawful, as the anti-corruption agency, CIO, has no jurisdiction over insurrection charges.
Opposition leaders celebrated the arrest as a victory for justice and democracy. Finance Minister Choi Sang-mok is currently serving as acting president.
Yoon can be held for up to 48 hours without a new warrant, after which authorities may detain him for up to 20 days.
Pro-Yoon supporters have gathered outside the investigation office to protest the arrest.
