Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

Emergency responders gather in the parking lot of the high school on the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Keith Srakocic)
Emergency responders gather in the parking lot of the high school on the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and being questioned. (AP Photo/Keith Srakocic)

    JUST WATCHED

    Doctor: Stabbing injuries 'significant'

MUST WATCH

Doctor: Stabbing injuries 'significant'

At least 20 students were injured in a stabbing attack at Franklin Regional Senior High School near Pittsburgh.

Doctor: Stabbing injuries 'significant'

At least 20 students were injured in a stabbing attack at Franklin Regional Senior High School near Pittsburgh.