CALABASAS (CBSLA) — A teenager from Jackson, Tenn. was arrested Thursday on suspicion of posting a school shooting threat against Calabasas High School on social media.

Authorities became aware of the social media post overnight and immediately launched an investigation. Calabasas High School Principal CJ Foss said in an email to parents that the threat was believed to have come from New Orleans with no known connection to Calabasas, and deemed to be not credible.

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Sheriff’s officials say they later identified the post as coming from a 17-year-old in Jackson, Tenn. Madison County sheriff’s deputies arrested the teen at about 8:30 a.m.

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The teenager did not have any weapons. Sheriff’s officials say the teen did not appear to have any intention of carrying out the threat.

Extra deputies will still be deployed to patrol the campus Thursday as a precaution.

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Anyone with information about the investigation can call the Malibu/Lost Hills Station at (818) 878-1808.