One male student is in custody this morning after he went on a stabbing rampage injuring 20 people. The incident happened in classrooms and the hallway of a high school in Murrysville, Pa., near Pittsburgh. A witness tells the Pittsburgh Post-Gazette that the male suspect, was tackled by assistant principal Sam King. Dan Stevens, spokesman for Westmoreland County emergency management, says the suspect was in custody at Franklin Regional High School in the Murrysville. Officials said the victims were mainly between the ages of 14 and 17 years.