NIWOT, Colo. - A 17-year-old boy was arrested Tuesday for threatening to blow up Niwot High School, the Boulder County Sheriff's office said.
Investigators say they received multiple "Safe2Tell" tips from the public about the threat found scrawled on a bathroom wall Jan. 7.
The same day, two students turned in a letter to staff members, which they claimed they found at the school. The letter was threatening in nature and identified approximately 22 students and implied a risk to their safety.
The suspect's name is not being released because he is under 18. He is being charged with one felony count of False Reporting of Explosives, and a misdemeanor count of Interference with Staff, Faculty, or Students of an Educational Institution.
On Jan. 10, a second written threat with a hit list of 30 names was found. Investigators have not said whether that threat is linked to the same suspect.
The principal of Niwot High School said Monday the investigation into threats of violence continues.