Absolutely. But doubtful on chairs thrown. They are confirming this happened in a hallway in the Science Wing.
In which case the knife wielder might get shoved into a wall or locker... books hurled, perhaps... kicking... it would get real ugly real quick.
Dan Stevens, Chief of Public Safety for Westmoreland County, says NONE of the injuries appears to be life threatening (initially they had reported one critical...victims at a “multitude of hospitals.”)
Perp is in custody of Westmoreland County Detectives. Under 18 yrs of age. No further info on perp given.