Sandy Hook Promise said Monday a potential school shooting in Northern California was recently prevented after a student reported a threat to the Say Something Anonymous Reporting System.

The nonprofit organization said the student from the Sequoia Union High School District — in the San Francisco area — recognized warning signs on another student's Instagram social media account and immediately reported the threats. The posts allegedly included firearms, ammunition, and a mapped-out plan for attack the school.

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"After the tip was reported to the Say Something Anonymous Reporting System, Sandy Hook Promise’s National Crisis Center immediately alerted Sequoia Union High School District’s l

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