School Stabbing Suspect May Have Made Threatening Calls to Classmates

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Pennsylvania, USA --- 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) Photo: Keith Srakocic/AP/Corbis

Police believe that 16-year-old Alex Hribal, who's been charged with stabbing 22 people at his Pennsylvania high school last week, may have threatened two other students on the night before the attack. According to a partially redacted search warrant released Monday, two students "received threatening phone messages and completed calls" in which the caller said he would "[blank] them up." However, one boy's father told the Pittsburgh Post-Gazette that his son is two years older than Hribal and had little contact with him, so the incident may be unrelated. Four boys ages 15 to 17 are still hospitalized, with three in critical condition.