ATHERTON, Calif. - A possible shooting at a Bay Area high school was thwarted when a student reported apparent online threats using a tip line intended to allay gun violence.

The Atherton Police Department first began receiving reports on Sept. 10 through Menlo-Atherton High School’s Sandy Hook Promise Say Something Anonymous Reporting System tip line of a potential threat against the school, the APD said in a statement .

Nicole Hockley, co-founder and CEO of Sandy Hook Promise and mother of one of the children killed in the 2012 Sandy Hook Elementary School shooting, said in a prepared statement that the organization forwarded tips it received to local police, prompting action.

A former Menlo-Atherton High School student who was attending another school at the time allegedly po

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