Police officers stand guard at Ori subway station following Thursday's attack in Seongnam, South Korea, Friday, Aug. 4, 2023. South Korean police detained a man suspected of stabbing a high school teacher with a knife Friday in the city of Daejeon. The stabbing follows a separate, apparently random attack on Thursday in which 14 people were wounded near a busy subway station in Seongnam. (AP Photo/Ahn Young-joon)