Seoul: South Korea's impeached President Yoon Suk Yeol has once again refused to cooperate with investigators regarding his brief martial law decree on December 3, local press reported on Friday. Yoon has been in detention at the Seoul Detention Center since Wednesday night as the Corruption Investigation Office for High-ranking Officials seeks a court warrant for his formal arrest.

According to Anadolu Agency, the anti-graft body has charged Yoon with "leading an insurrection and abuse of power," arguing that his arrest is necessary due to the seriousness of the crime and the potential risk of him committing similar offenses in the future. The court is scheduled to convene on Saturday to deliberate on this unprecedented request against a sitting president in South Korea.

Yoon was apprehended during a second attempt by a team of investigators spearheaded by the anti-graft organization on Wednesday. Despite being questioned for over ten hours on that day, Yoon reportedly remained unresponsive to allegations of insurrection and abuse of power linked to his brief martial law declaration. Since his detention, he has twice declined to participate in further questioning, citing health concerns.

Yoon's 48-hour detention period is set to conclude on Friday night, local time. Meanwhile, a court rejected his appeal on Thursday to examine the legality of his detention.

In a related development, authorities on Friday detained Yoon's acting security chief, Kim Seong-hoon, who faces accusations of orchestrating efforts to prevent Yoon's detention. Kim assumed the role of presidential security chief following the resignation of his predecessor, Park Chong-jun. Park had led the security team when investigators initially failed to arrest Yoon on January 3, after which he resigned following an inquiry into his alleged obstruction of state officials.