President Yoon Suk Yeol is taken to the Seoul Detention Center after being questioned over his decision to declare martial law at the Corruption Investigation Office for High-ranking Officials in Gwacheon, Gyeonggi Province, Wednesday. Yonhap

President Yoon Suk Yeol will not cooperate with investigators' any more request for further questioning over allegations of insurrection and abuse of power over his decision to impose martial law early last month, his lawyers said.

According to his lawyers, Thursday, Yoon would not show up for an interrogation session planned later that day by the Corruption Investigation Office for High-ranking Officials (CIO).

“Yoon is not in a good condition, and he has nothing more to say after the interrogation the previous day,” Yoon Kap-keun, one of his lawyers, told Yonhap News Agency.

Yoon was detained at the presidential residence in Seoul on Wednesday morning and was brought to the CIO headquarters. During two questioning sessions that lasted through 9:40 p.m. that day, the president exercised his right to remain silent.

The investigators were planning to continue questioning on Thursday afternoon by skipping a morning session, as the lawyers said Yoon's bad health conditions. But they said again that he would refuse the afternoon session as well.

Since Wednesday's questioning, the president has been in the Seoul Detention Center in Gwacheon, Gyeonggi Province.