A Shorewood High School student has been arrested for allegedly threatening to “shoot up” the school.

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A 17-year-old Shorewood High School student was arrested Thursday night for threatening to shoot up the school, according to police.

School officials were alerted to a threat when a parent reported rumors about a student planning a shooting at the Shoreline school.

Shoreline police learned that the teen had told other students “not to go to school tomorrow ” because he had planned on “shooting up the school,” the police said. The teen also posted a message on Snapchat which read, “Goodbye “SW.”

Police arrested the teen at his job in Lynnwood just after 7 p.m. Thursday. He was booked into the Youth Services Center for investigation of felony threats.

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Police praised school officials, students and the parents who reported the threats.

“This is exactly what we tell people to do,” King County Sheriff John Urquhart wrote in a news release. “If you see or hear something, say something.”

The sheriff’s office provides police services for Shoreline under a contract.