A sign for Cabrillo High School.
Cabrillo High School in Long Beach.

A social media post that threatened a shooting today at Cabrillo High School sparked concern among students and parents, but a school official said police haven’t found any evidence that the threat is credible.

Cabrillo remains open, but law enforcement is closely monitoring the situation, according to an email from Chris Eftychiou, a spokesman for the Long Beach Unified School District. Extra police and school safety personnel will be at Cabrillo as a precaution, Eftychiou said.

Pictures posted to a neighborhood Facebook page showed screenshots of the potential threat. They appear to show an Instagram account called @cabrilloconfessions_ saying someone was planning on “shooting the school up” at lunchtime.

Long Beach police say their investigation is ongoing.

This threat comes just a few days after a shooting at Oxford High School in Michigan that left four dead and seven wounded. Officials in Michigan said the shooting has also prompted a wave of copycat threats that have turned out to be false, according to news reports.

Police seek public’s help in finding hit-and-run driver after 72-year-old killed while crossing the street