Parents rush to their children's high school in the U.S. state of Pennsylvania, near Pittsburgh.<br/> <br />A stabbing spree during the 7 o'clock morning session left at least 20 people injured here.<br/> <br />An emergency management deputy briefed reporters.<br/> <br />(SOUNDBITE) (English) DAN STEVENS, DEPUTY EMERGENCY MANAGEMENT COORDINATOR FOR WESTMORELAND COUNTY, SAYING:<br/> <br />"Our 911 center received a call from the resource officer here at Franklin Regional High School that he needed medical assistance at the school. He had multiple patients involved in a stabbing. Currently we have 20 students that have been injured, four of which have been flown by medical helicopter."<br/> <br />The suspected attacker is said to be a student.<br/> <br />He's being questioned by police and detectives.<br/> <br />The attack took place in several classrooms and hallways, the official said.<br/> <br />It's unclear how many of the injured were stabbed by the suspect and how many were hurt while scrambling to get away.<br/> <br />(SOUND
