CORAOPOLIS, Pa. - A student has been awarded a medal for rendering first aid to students injured in a stabbing rampage at a suburban Pittsburgh high school.

Franklin Regional High School senior Zachary Fleischauer was awarded an Army Achievement Medal on Sunday at a ceremony in Coraopolis. Fleischauer joined the Army Reserve last year.

He was in the school library the morning of April 9 when he heard screams, followed by the fire alarm.

WPXI-TV ( ) says Fleischauer assisted four students, applying pressure and taping students' wounds.

Lt. Col. John Dowling called Fleischauer's performance outstanding.

Twenty students and a security guard were injured in the spree. The last of the injured students was released from the hospital on Saturday. A 16-year-old boy has been charged in the attack.