Three students were stabbed this morning at Carrick High School and police have a suspect in custody. In a statement, Pittsburgh Public Schools says three students were stabbed by another student with a small knife. Two students were taken to a hospital with stab wounds to their abdomens. A third victim has a minor cut and was treated at the scene and released. A student in custody also had a hand laceration and was treated at the scene before being transported to Police headquarters. Carrick High School remains in lockdown.