Police: School stabber apparently behind threats

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Police: School stabber apparently behind threats
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people, including students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the stabbings at the Franklin Regional High School near Pittsburgh, is taken from a district magistrate after he was arraigned on charges in the attack on Wednesday, April 9, 2014 in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 21 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Brett Hurt, 16, a sophomore at Franklin Regional High School in Murrysville, Pa.,and a victim in the stabbings that took place their on April 9, sits in a wheelchair next to his mother Amanda Leonard during a news conference at Forbes Regional Hospital, Thursday, April 10, 2014, in Monroeville, Pa. Authorities have charged Alex Hribal, 16, with four counts of attempted homicide and 21 counts of aggravated assault in the attack. (AP Photo/Keith Srakocic)
Brett Hurt, 16, a sophomore at Franklin Regional High School in Murrysville, Pa., and a victim of the stabbings that took place their on April 9, talks about the attack during a news conference as his mother mother Amanda Leonard looks on, Thursday, April 10, 2014, at Forbes Regional Hospital in Monroeville, Pa. Authorities have charged Alex Hribal, 16, with four counts of attempted homicide and 21 counts of aggravated assault in the attacks. (AP Photo/Keith Srakocic)
A man and woman walk away from Franklin Regional High School after more then a dozen students were stabbed by a knife wielding suspect at the school on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Brian F. Henry)
Parents and students embrace along School Road near Franklin Regional High School after more than a dozen students were stabbed  by a knife wielding suspect at the school on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Tribune Review, Sean Stipp)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., stumbles as he is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Jenna Mickel, right, a sophomore at Franklin Regional High School leaves school after being picked up by her father Richard after several people were stabbed in 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/Gene J. Puskar)
People walk past the athletic fields 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)
A Salvation Army disaster services vehicle drives past a school bus onto the campus of the Franklin Regional School District where several people were stabbed at Franklin Regional High School, 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)
Students leave 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/Gene J. Puskar)
A policeman directs a driver to the area to pick up students 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)
Students leave 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 questionedow}, April 9, 2014. (AP Photo/Gene J. Puskar)
A student leave the campus of the Franklin Regional School District after more then a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Gene J. Puskar)
CORRECTS BYLINE TO GENE PUSKAR - Students leave 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/Gene Puskar)
CORRECTS BYLINE TO GENE PUSKAR - A woman walks onto 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/Gene Puskar)
Students leave 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/Gene Puskar)
A police vehicle is parked at the edge of the parking lot the campus of the high school on 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)
Students walk past a row of buses as they leave the campus of the Franklin Regional School District after more then a dozen students were stabbed by a knife wielding suspect at nearby Franklin Regional High School on Wednesday, April 9, 2014, in Murrysville, Pa., near Pittsburgh. The suspect, a male student, was taken into custody and is being questioned. (AP Photo/Gene J. Puskar)
The sign a group of students taped up near the entrance, supports their school, Franklin Regional High School near Pittsburgh, on Thursday, April 10, 2014 in Murrysville, Pa. A knife wielding student injured over 20 people in a stabbing attack there on April 9. (AP Photo/Keith Srakocic)
A group of students tapes up a sign supporting their school near the entrance to Franklin Regional High School Thursday, April 10, 2014 in Murrysville, Pa. A knife wielding student injured over 20 people in a stabbing attack the day before. Authorities have charged Alex Hribal, 16, with four counts of attempted homicide and 21 counts of aggravated assault in the attack. (AP Photo/Keith Srakocic)
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MURRYSVILLE, Pa. (AP) -- Detectives believe a boy charged with stabbing 21 other students and a security guard at his Pittsburgh-area high school threatened two students by phone before the attack.

The reference to the threatening phone messages and completed calls is contained in a search warrant affidavit. Westmoreland County District Attorney John Peck says neither student was among the victims in Wednesday's attack at Franklin Regional High School.

County detectives got the warrant for the home of Alex Hribal (RY'-bal). He is charged as an adult with four counts of attempted homicide and 21 counts of aggravated assault.

Hribal's attorney and the district attorney did not return messages seeking comment.

Four students are still hospitalized, three in critical condition. The fourth was upgraded to fair condition Monday.

Teachers returned to the school Monday but classes don't resume until Wednesday.

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

Teachers on Monday attended a counseling session at a church and then returned to a high school where a student stabbed 21 others and a security guard last week, but they scuttled plans to march the half block between the two to avoid the media.

Monday's activities were the start of a three-day effort to reopen Franklin Regional High School for the first time since a boy attacked fellow students with a pair of kitchen knives last Wednesday.

On Tuesday, students and parents will get a chance to see that bloody hallways have been cleaned up and other steps taken to return the school to normal. Classes resume on Wednesday.

Four students were still hospitalized in critical condition Monday as the teachers gathered with two crisis counselors hired by the district. To avoid television cameras, the teachers drove to the school's parking lot or made the short walk up a wooded hill between the church and the 1,200-student school.

Two parents who chatted with reporters Monday, said their children were eager to get back to school.

"That's where he wants to be, to be with his friends," Jeff Mauro said of his son, Jamie, a ninth-grader who witnessed some of the stabbings. "This has been a learning experience that we have to love each other - all of us."

Laura Thompson said her children "seem to think they're going to be fine. But I think it's going to be different when they're back in that environment."

Alex Hribal, 16, is charged with four counts of attempted homicide and 21 counts of aggravated assault in the stabbings.

His attorney, Patrick Thomassey, didn't return calls and an email seeking comment, but he told the Pittsburgh Post-Gazette that he plans to waive Hribal's right to a preliminary hearing next week.

Once that happens, Thomassey will ask a Westmoreland County judge to move the case to juvenile court, a move prosecutors are expected to contest. Thomassey said that request will be based largely on a mental health evaluation by a doctor he's hired.

Police: School stabber apparently behind threats
Alex Hribal, the suspect in the stabbings at the Franklin Regional High School near Pittsburgh, is taken from a district magistrate after he was arraigned on charges in the attack on Wednesday, April 9, 2014 in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 21 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., stumbles as he is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the stabbings at the Franklin Regional High School near Pittsburgh, is taken from a district magistrate after he was arraigned on charges in the attack on Wednesday, April 9, 2014 in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 21 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, center, the suspect in the stabbings at the Franklin Regional High School near Pittsburgh, is taken from a district magistrate after he was arraigned on charges in the attack on Wednesday, April 9, 2014 in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., stumbles as he is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the stabbings at the Franklin Regional High School near Pittsburgh, is driven away from a district magistrate in a Westmoreland County Sheriff's car after he was arraigned on charges in the attack on Wednesday, April 9, 2014 in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 21 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people, including students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people, mostly students, in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people including students in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people including students in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people including students in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., is escorted by police to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people including students in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
Alex Hribal, the suspect in the multiple stabbings at the Franklin Regional High School in Murrysville, Pa., sits in a police car while being escorted to a district magistrate to be arraigned on Wednesday, April 9, 2014, in Export, Pa. Authorities say Hribal has been charged after allegedly stabbing and slashing at least 19 people including students in the crowded halls of his suburban Pittsburgh high school Wednesday. (AP Photo/Keith Srakocic)
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