SANTEE (AP) — Authorities have arrested a 14-year-old boy they say posted an online threat against a San Diego County school that included a photo of an AR-15 rifle made of Legos.

The boy was arrested Tuesday on suspicion of making terrorist threats.

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The San Diego County Sheriff’s Department says the boy is a freshman at West Hills High School in Santee.

He allegedly posted an Instagram photo of the toy weapon with the warning “Don’t come to school tomorrow.”

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Authorities say the student had access to hunting rifles in his home.

A surge in threats against schools has prompted numerous arrests in the wake of the Florida school shooting.

Also Tuesday, San Diego police arrested a 15-year-old boy who allegedly said he planned to shoot up Westview High School.

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Copyright 2018 The Associated Press.