A student stabs 20 people at Franklin Regional High School in Murrysville, Pennsylvania.

The Franklin Regional High School stabbing was a mass stabbing that occurred on April 9, 2014, at Franklin Regional High School in Murrysville, Pennsylvania. Alex Hribal, a 16-year-old sophomore at the school, used a pair of eight-inch kitchen knives to stab and slash 20 students and a security guard. Four students sustained life-threatening injuries, but all survived.