Seoul: South Korean President Yoon Suk Yeol will not attend the first formal hearing of his impeachment trial this week due to concerns about his safety, Yonhap news agency reported Sunday. Yun Gap-geun, Yoon's lawyer, made the statement ahead of the first hearing by the Constitutional Court scheduled for Tuesday. According to Anadolu Agency, investigators are still attempting to arrest Yoon for questioning in a separate case concerning his brief imposition of martial law last month. "As attempts to unlawfully execute an illegal and invalid arrest warrant are underway, there are concerns about personal safety and mishaps," Yun said, emphasizing the need for resolving security issues so the president can participate in the trial. Yun further stated that President Yoon would attend the hearing if the safety concerns are addressed. The Constitutional Court had announced that oral arguments for the trial would commence on Tuesday, with five sessions planned, concluding on February 4. The nation was taken by su rprise when Yoon imposed martial law on the night of December 3, a move that was reversed after parliament passed a motion against it. The 64-year-old leader was impeached on December 14 and is currently suspended from office, with state affairs being managed by an acting president. Yoon remains within his highly secured official residence in Seoul.