Authorities have charged a 16-year-old student with four counts of attempted homicide and 21 counts of aggravated assault in a knife attack that wounded 21 students at a Pennsylvania high school last week.
At least four of those students at Franklin Regional High School in Murrysville, a suburb of Pittsburgh, were injured seriously.
The youth, who allegedly wielded two knives, was eventually subdued with the help of a school police officer and an assistant principal. Sophomore Alex Hribal is being charged with the crime as an adult.
