A disturbing message posted to social media late Tuesday threatened gun violence at Mt. Carmel High School in San Diego, school officials confirmed.
San Diego Police received a call at 10:26 p.m. Wednesday from someone reporting the threat posted to Instagram.
Police officers say a 16-year-old student posted a picture of a gun with text similar to the phrase "tomorrow it's going down."
Investigators took the post as a threat to the teenager's school.
The student responsible for the post was located at his home after midnight and taken to a nearby medical facility for an evaluation. No weapon was recovered, police said.
Greg Magno, the principal of the high school in the Poway Unified School District, sent a note about the incident to families Wednesday morning saying that the late-night social media post “was used to circulate a threat about the school.”
However, he said quick reporting by vigilant members of the Rancho Penasquitos community led authorities to the person suspected of making the post.
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“Because of our community’s willingness to report early and often, Mt. Carmel Administration and SDPD were able to work through the early morning to investigate this,” Magno’s note stated.
On Wednesday, the principal said police officers and school administrators would continue to work closely together to speak with the person responsible for the post.
There is no threat to Mt. Carmel High School related to the post, Magno said.
Poway Unified School District spokesperson Christine Paik told NBC 7 school is in session as normal. She said Magno has been meeting with parents throughout the morning who have come to the campus with concerns.