4 seriously injured; 20 hurt overall in Wednesday morning stabbings in Pennsylvania

MURRYSVILLE, Pa. -- 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.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

Several people were stabbed Wednesday morning at a high school near Pittsburgh, and a suspect was taken into custody, an emergency official said.

Dan Stevens, the spokesman for Westmoreland County emergency management, said five or six people were reported stabbed at about 7:20 a.m. at Franklin Regional High School in Murrysville, about 15 miles east of Pittsburgh.

It wasn't immediately clear if the suspect and the victims are students, adults or a mix of both. It doesn't appear that any of the victims suffered life-threatening injuries, Stevens said, though several helicopters were seen flying people from the scene to area hospitals.

School officials and Murrysville police didn't immediately return calls seeking further details, but the school issued a bulletin on its website saying: "A critical incident has occurred at the high school. All elementary schools are canceled, the middle school and high school students are secure."

The district serves about 3,600 students who live in the bedroom communities of Murrysville, Export and Delmont. The elementary and middle schools are part of the same campus.

The high school was on lockdown, and students were being kept there as a precaution as school and law enforcement officials double-checked the premises. School officials were making arrangements to bus the middle school students home.

District Attorney John Peck said he was monitoring the situation. Detectives from his office were also investigating, though Peck said he had no information beyond that being reported by Pittsburgh television news stations.