UPDATE - 3:00 P.M.
MURRYSVILLE, Pa. (AP) -- Doctors say one of the students wounded in a stabbing attack this morning at a Pennsylvania high school is on a ventilator, after a knife pierced his liver, missing his heart and aorta by just millimeters.
In all, at least five students were critically wounded and 15 other people were also hurt -- including a school police officer who confronted the assailant. The suspect is identified as a 16-year-old student. He's now in custody.
A witness says he had a "blank expression" on his face as he flailed away with two knives in the hallway just before the start of classes this morning at Franklin Regional High School, 15 miles east of Pittsburgh. Police say the motive is under investigation.
Doctors say they expect all the victims to survive, despite large and deep puncture wounds to the abdomen in some cases. The wounded campus police officer has been released.
MURRYSVILLE, Pa. (AP) -- A doctor says some victims of a multiple stabbing at a high school near Pittsburgh have suffered injuries classified as life-threatening, though all are expected to survive.
Dr. Chris Kaufman says two victims were in the operating room and one was awaiting surgery at Forbes Regional Medical Center, a few miles from Franklin Regional High School in Murrysville.
Officials say four students were believed to be the most seriously injured Wednesday morning by a fellow student who stabbed or slashed others, injuring as many as 20.
Westmoreland County emergency management spokesman Dan Stevens says not all of the 20 injured were cut by the knife, though most were. Some suffered scrapes and cuts in the mayhem that ensued.
The suspect, a male student, was taken into custody and being questioned.