MURRYSVILLE, Pa. (KDKA/AP) – Doctors say a 17-year-old student who was among the most critically injured in a high school stabbing rampage outside Pittsburgh continues to improve after undergoing another surgery.

The University of Pittsburgh Medical Center said Sunday that the surgery went well. It didn’t mention the student by name, but says he’s still listed in critical condition.

READ MORE: Guentzel Scores 3 In 2nd Period, Penguins Beat Canucks 4-1

Spokesman Rick Pietzak says it’s the student’s fourth and last scheduled surgery.

Seventeen-year-old Jared Boger is among four students still hospitalized following Wednesday’s attack at Franklin Regional High School. He’s at UPMC Presbyterian, while three others are in critical condition at Forbes Hospital.

Within minutes of arriving at UPMC Presbyterian Hospital, Boger was in the OR for damage control surgery. The stab wound was two inches wide and penetrating nearly to his spine.

The knife had pierced his liver, diaphragm and major blood vessels.

READ MORE: Starlink Satellites Mistaken As UFOs Over Pittsburgh

But one of Boger’s trauma surgeons, Dr. Juan Carlos Puyana, is convinced that the injuries would have been more lethal with a different weapon.

Sixteen-year-old Alex Hribal faces four counts of attempted homicide and 21 counts of aggravated assault in the attack. The school will resume classes Wednesday and teachers will return to work Monday.

The process of re-opening the school will be a gradual one, a process determined by a group of teachers, counselors, administrators and students, beginning with the return of the entire staff Monday morning.

Beginning Tuesday, students directly affected by the incident will be able to return and walk the halls or talk with teachers. The rest of the students will be able to return later in the day Tuesday.

RELATED LINKS
Franklin Regional Students To Return To Class Wednesday
Community Constructs Banner Of Support For Franklin Regional
Motive Remains Unclear For Stabbing Attack At Franklin Regional High School

Join The Conversation, Like KDKA On Facebook
Follow KDKA On Twitter

MORE NEWS: Pitt Rolls By Wake Forest 45-21 For ACC Title

(TM and © Copyright 2014 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2014 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

Lynne Hayes-Freeland