A male sophomore is in custody after 20 were injured in "multiple stabbings" at Franklin Regional High School in Murrysville, Pa., this morning, WPXI reports. Nineteen students and a security guard were hurt, according to KDKA, which reports that the suspect had two knives on him. Of those injured, four are in serious condition, according to emergency management official Dan Stevens. The adult being treated was reportedly not stabbed, but Stevens says all of the injured students suffered lacerations or punctures. Among the more serious injuries, per CNN: knife wounds to the torso, abdomen, chest, and back areas.
One student tells WTAE that a person came into school, located about 15 miles east of Pittsburgh, and began slashing people with a knife, including some of his friends. Stevens says the stabbings took place in several classrooms and a hallway before classes began. The town's police chief says the school's principal had "an interaction" with the alleged attacker, who was then handcuffed by a school resource officer and sustained injuries to his hand. At least one hero has emerged so far in all this; a hospital official says one student may have saved a classmate's life by applying pressure to his wound.