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The Granite Falls police have arrested a 17 year-old male following a month-long series of online threats made against students and staff at the high school.

The young man, who is a student at the high school, was taken into custody after a search warrant was issued Thursday night. He confessed to making the series of violent threats against specific students, the high school student body and school staff since December 15, 2013 via Ask.FM.

Ask.FM is a social networking web site based in Latvia which allows users to post a question or statement anonymously.

Working with detectives from the Snohomish County Sheriff's Office and the FBI, police were able to establish probable cause for arrest by tracing the online postings back to the location where the search warrant was served.

The male was booked into the Denney Juvenile Justice Center and charged with cyberstalking and felony harassment. Police say the teen has confessed.

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