South Korean police have raided the offices of President Yoon Suk Yeol after his short-lived declaration of martial law last week. The police investigation comes as Yoon has been barred from exiting South Korea while he remains under investigation for committing treason. Separately, South Korea’s top prison official said the disgraced former Defense Minister Kim Yong-hyun attempted to end his own life while in custody. Kim was jailed on Sunday after he allegedly recommended imposing martial law.