Impeached Prime Minister Han Duck-soo appears for a special parliamentary committee session into President Yoon Suk Yeol's declaration of martial law at the National Assembly in Seoul, Jan. 15. Yonhap

Impeached Prime Minister Han Duck-soo apologized Wednesday over President Yoon Suk Yeol's short-lived imposition of martial law last month, saying it was "wrong" and had procedural problems.

Han made the remarks in a special parliamentary committee session into Yoon's martial law declaration earlier in the day as investigators detained the impeached president for questioning.

"I always feel apologetic that everyone involved, including myself, was unable to prevent the situation from reaching this point," Han said. "Looking at its substantive flaws, including procedural ones, I believe (the martial law) was not normal."

"I think that the martial law was wrong," he said.

Han was among the participants of a Cabinet meeting Yoon convened shortly before his martial law declaration on Dec. 3. Han said he suggested holding the meeting as he believed all Cabinet members would oppose the plan.

Han took over as acting president after Yoon's impeachment on Dec. 14, but he himself was impeached by the National Assembly less than two weeks later. (Yonhap)