A Seoul court issued a warrant Saturday to detain impeached President Yoon Suk Yeol for an extended period over his botched martial law bid last month in the first such detention of a sitting South Korean president.

With the court’s approval of the warrant, investigators can now hold him for up to 20 days, including the time he has already spent at a detention center. If convicted of insurrection, Yoon could face

Yoon’s detention, after a tense standoff outside the presidential residence, marks the latest chapter in a bewildering series of events since his martial law decree.