IDENTIFIED: Student, 16, 'who left TWENTY injured, five critically, after stabbing spree with two knives' at Pennsylvania high school

Murrysville police chief Thomas Seefeld confirmed a 16-year-old male student is in custody after the stabbing at Franklin Regional School

CBS Pittsburgh later identified the boy as Alex Hribal



Four of the victims were airlifted to hospital and three were being operated on, according to officials

The majority of victims are 14-17 year old students though one adult - a male security guard - suffered a stomach wound

Police were called to the school by a resource officer at 7:13 a.m., about 15 minutes after the school doors opened for the day

The suspect allegedly ran through multiple classrooms and hallways stabbing victims with two knives

One witness told NBC News that he saw 'blood all over the floor'

Assistant principal Sam King wrestled the suspect to the ground and a resource officer who is also a police officer cuffed him



Brave student Nate Scimio set off the fire alarm to alert other students



Peers described the suspect as quiet but not bullied and said he had friends

FBI agents have joined local law enforcement in the investigation



Suspected stabber: Alex Hribal, pictured, is reportedly stabbed 20 people Wednesday morning at his Pennsylvania high school

Twenty people have been injured - five with life-threatening wounds - in a stabbing spree Wednesday morning at Franklin Regional High School in Murrysville, Pennsylvania.

Murrysville police chief Thomas Seefeld confirmed a 16-year-old male student is in custody, and CBS Pittsburgh later identified the suspect as Alex Hribal. The teen was photographed being driven from the police station to a nearby hospital for medical treatment just before 10:30a.m.

In a morning press conference, Seefeld revealed an assistant principal wrestled the suspect to the ground after he ran through multiple classrooms and hallways brandishing two knives.



Four of the victims were airlifted to hospital and at least three of those are still in critical condition, according to Westmoreland County emergency management and hospital officials.

Forbes Regional Hospital in Monroeville and five other hospitals were treating patients.



The majority of victims are 14-17 year old students though one adult - a male security guard - suffered a stomach wound, Seefeld confirmed.

Police were called to the school by a resource officer at 7:13 a.m. - about 15 minutes after the school doors opened for the day. One witness told NBC News that he saw 'blood all over the floor.'

A witness told KDKA the stabbings happened in the science wing of the building in multiple class rooms and hallways. Many students were not yet on campus and were alerted to the emergency while on the school bus.

Hribal was being questioned by detectives, but just before 10:30a.m. the student was driven in a police car from Murrysville Police Station to a local hospital to be treated for a stab wound. He later returned. An image from WPXI shows him being escorted by police.

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'Quiet kid': Friends described Alex Hribal as shy and quiet and were shocked to hear he was the stabbing suspect

Attacker: Classmates described Alex Hribal as the stabber and claim he thrust two kitchen knives at 'everyone who got in his way'



Quiet: Hribal, pictured Wednesday, was described as a quiet student but his peers said he wasn't bullied

Evacuation: Students at Franklin Regional High School were evacuated after a stabbing left 20 people injured Wednesday morning

Injuries: Police confirmed 20 victims were injured in the early morning attack, some suffering minor scrapes and cuts to extremities

Victims: Four of the patients have been airlifted to hospital with critical stab wounds, according to Westmoreland County emergency management

Cuts: The stabbing suspect is seen being driven from the Murrysville police station before 10:30a.m. for medical treatment

Officials do not yet know a motive or whether the suspect targeted certain students. Seefeld confirmed the 16-year-old used two knives in the early morning attack, one in each hand.



According to KDKA Hribal is being charged as an adult.



The police chief said he was finally accosted by assistant principal Sam King who heroically tackled the blade-wielding teen.

'There was a school principal who had contact with the juvenile and that led to his (arrest),' Seefeld said.

The school resource officer who called 911, also a Murrysville police officer, then handcuffed the suspect and awaited backup. Neither adults were harmed, however a security guard was stabbed in the abdomen, Seefeld said.

He added of the school grounds: 'It was a chaotic scene outside with people running everywhere.'

Seefeld also said investigators were looking into claims that a threatening phone call was made between Hribal and a fellow student the night before the attack. This has not been confirmed.

Hero: Nate Scimio, pictured, posted this image to Instagram after the attack in which he is believed to have pulled the fire alarm to alert other students

Victim: One 15-year-old girl, Ariana Schofield of Export, pictured, was flown from the school to Allegheny General Hospital, where she was treated and released

Stabbing: At least six people have been injured in a reported stabbing Wednesday morning at Franklin Regional High School in Murrysville, Pennsylvania. Emergency responders are at the school, pictured

Emergency response: A witness told KDKA the stabbings happened in the science wing of the building in multiple class rooms and hallways

Worried: Parents lined up to collect their children after the stabbings

Families: A pair of women walk arm-in-arm off the campus of the Franklin Regional School District, where several people were stabbed

Nate Scimio is reportedly the young man who pulled the fire alarm, alerting students to the emergency and encouraging them to run.

He is also believed to have been injured when he stepped in front of other students to protect them.



The teen posted a photo of himself in a hospital gown at UPMC Children's Hospital, with the caption 'Chillin' at Children's,' and appeared to be in good condition.

Another hero has been identified - a young girl who applied pressure to her friend who was seriously injured. Her name is not yet known.



Dr Mark Rubino from Forbes Hospital said: 'She displayed an amazing amount of composure to help that friend who was losing a lot of blood. She probably played a significant role in his ability to survive this.'

Victim Nate Moore, 15, was stabbed during the rampage and said he had to be treated with 15 stitches.

'It was really fast. It felt like he hit me with a wet rag because I felt the blood splash on my face. It spurted up on my forehead,' Moore told the AP.

Ariana Schofield, 15, of Export, was flown from the school to Allegheny General Hospital, where she was treated and released.

Student Mia Meixner told CNN's Wolf Blitzer she was standing at her locker when the commotion began.

'And I turned around and I saw two kids on the ground,' she said, adding that initially she thought a fight had broken out but then saw blood.



'I saw the kid who was stabbing people get up and run away.'



Suspect's home: A police ca r was spotted outside the home, pictured, of the alleged stabber

Tears: Emotional students leave the campus of the Franklin Regional School District, where several people were stabbed



Worried: A man and woman walk away from Franklin Regional High School. It was taking time to reunited parents wit their kids Ongoing investigation: A police officer stands by the scene outside Franklin Regional High School where FBI agents have been sent to help with the investigation

Patients: Multiple students were in critical condition after the stabbing though some were released from hospital a few hours later

Active: Scores of ambulances lined up at the school where the suspect brandishes two knives

Scene: Discarded clothing and medical supplies are seen at the grounds of Franklin Regional High School after the stabbing

She told the network she saw three students helping a bleeding freshman and then saw a senior girl she knew by the cafeteria doors.



'She was gushing blood down her arm,' Meixner said.



She ran to help the girl but was soon told to leave by a teacher who took over caring for the victim.



'So then I just ran out of the school and tried to get out as soon as possible.'

She said the suspect didn't say anything during the attack, 'he was just kind of doing it.'

But Meixer added in the CNN interview that 'he had this, like, look on his face that he was just crazy and he was just running around just stabbing whoever was in his way.'

Another witness described his face as 'expressionless.'



Forbes Hospital said they had received 8 victims, all male - including one adult - and that other victims have been taken to nearby hospitals. Three were still being operated on after suffering punctures to multiple organs. Another two have been stabilized but remain in critical condition also.



Dr Chris Kaufmann said: 'None of these (patients have) superficial wounds, they are all significant stab wounds, every one. They are all torso stab wounds, chest, back abdomen, flank.'

Five victims went to UPMC East, four to UPMC Children's and one each to UPMC Mercy, UPMC Presby and Schofield at Allegheny. Two patients -a male and female- have reportedly been released now from UPMC East.

UPMC Presby said a 17-year-old victim is on life support, and in critical condition. A spokesman said the teen had a stab wound to his chest that barely missed his aorta.



Hribal's peers described the 16-year-old as a smart, quiet teen who 'was not bullied.'

Location: Franklin Regional High School is located in Murrysville, Pennsylvania, not far from Pittsburgh

Scene: One of the patients has been airlifted to hospital, according to Westmoreland County emergency management. Forbes Regional Hospital in Monroeville is treating several of the other patients

Busy: Police cars and ambulances lined the streets around the school

Panic: A police officer speaks with a worried parent outside Franklin Regional High School after reports of stabbing injuries in Murrysville, Pennsylvania in this still image taken from video provided by WPXI

School: A woman walks onto the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School

Frenzy: Parents gather outside Franklin Regional High School after reports of stabbing injuries in Murrysville

'I don't know what could possibly motivate him to do it,' Shane Molyneaux told NBC News.



'He was somewhat friendly. He was very smart. He was not bullied and he did not seem like a mean kid. He did have friends.'

Meixer told CNN of the suspect: 'He kept to himself a lot,' she said. 'He didn't have that many friends that I know of, but I also don't know of him getting bullied that much.'



The FBI is now involved to look into the background of the suspect and whether the attack was planned.



Earlier, the father of a senior told KDKA that his daughter said a student - later revealed to be Nate Scimio - set off the fire alarm after the attack in an effort to clear the school.

'The student who pulled the alarm was part of the incident, witnessed the incident so it a good thing to do on his part,' the parent said.

He said his daughter had been evacuated to the football field and then the middle school. Parents are now picking up their children.

Valley News Dispatch City Editor Matt Provenzo described the scene shortly after 7 a.m. as he was dropping his ninth-grader son off at the high school.

He told to Triblive.com dozens of students were streaming from the school.

'You could hear that the fire alarm had been pulled,' Provenzo said.

Another father, Morris Huntley, said his daughter called him in a panic after the attack.



'She was just frantic. I had never heard her talk like that, that's why I just got off the phone and got down here as fast as I could,' Huntley said.

Citing 'a critical incident,' the school district said the high school students and middle school students nearby were 'secure,' and that elementary school had been canceled for the day.



'Additional information will be released as soon as possible. Please keep our campus clear of traffic,' the district said in a statement posted on their website shortly after 8 a.m.



Governor Tom Corbett sad he was 'shocked and saddened' in a statement.

'As a parent and grandparent, I can think of nothing more distressing than senseless violence against children,' he said. 'My heart and prayers go out to all the victims and their families.



'I have directed the Pennsylvania State Police to assist local law enforcement in its investigation in any way possible. Other state resources will be made available to the community, if needed. I assure the citizens of Murrysville that they have the full support of my administration.'









