A Ford Expedition used by the Pennsylvania State Police in Millersville, Pennsylvania.
A Ford Expedition used by the Pennsylvania State Police in Millersville, Pennsylvania. (illustrative) Photo by Wikipedia
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Some 20 people, mainly students, were injured Wednesday in multiple stabbings at a high school in the U.S. state of Pennsylvania.

A male student was taken into police custody for questioning following the attack at the Franklin Regional High School in Murrayville near Pittsburgh, Pennsylvania.

Four people were seriously injured and flown to area hospitals, police said. Most of the victims were between the ages of 14 and 17.

A doctor said some of the victims suffered injuries classified as life-threatening, though all were expected to survive.

Dr. Chris Kaufman said 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.

Westmoreland County emergency management spokesman Dan Stevens said not all of the 20 injured were cut by the knife, though most were. Some suffered scrapes and cuts in the mayhem that ensued.

Stevens said the suspect used a knife, though he didn't say what kind or why he attacked the others.