Authorities say a teenager is in custody for allegedly threatening to injure other students at a high school in the Phoenix suburb of Anthem.
Maricopa County Sheriff's officials say 18-year-old Nicholas Goettl, a Boulder Creek High School senior, was arrested Monday.
They say he's been booked into jail on suspicion of hoax.
The student allegedly went online and posted a message that he planned to bring a gun to school and shoot other students as part of a senior prank. According to MCSO, the investigation determined the threat was posted by Goettl.
for my senior prank im going to bring an ar-15 to school and kill everyone
Sheriff's officials say a posse member who aids Boulder Creek High on security issues obtained information that led to the arrest.
MCSO says other Twitter postings included a yearbook photo which had "I bear witness that there is no god but God. I bear witness that Muhammad is the messenger of Allah." beneath the picture. Officials also stated, "There was also information posted on a Facebook page connected to the subject that spoke to seniors starting a "Riot" on Monday due to some students not being able to walk for graduation due to getting into trouble for vandalizing the school."
The teen was contacted at his father's house in Anthem and was interviewed by sheriff's detectives and allegedly admitted to posting the threat.
"Our school patrol posse is in place to work towards ensuring the safety of students on campus and neutralizing threats to their lives," said Sheriff Joe Arpaio.
The Associated Press contributed to this report.
Teen accused of threatening Anthem high studentsMore>>