Maricopa High School is taking extra precautions after an anonymous school threat was posted online.
The principal for Maricopa High School sent a letter to families early Tuesday morning about the situation.
Maricopa police said the threat was received overnight. They are working with the FBI and other agencies to find out who is responsible.
The campus will remain open on Tuesday and there will be additional officers on campus and in surrounding neighborhoods.
Students are being asked to leave their backpacks at home. Bags brought to school will be stored with school administration.
If you choose to keep your child at home today, the student will not be penalized for the absence. Report the absence to the school at 568-8100.
There was also a social media post that threatened violence at McClintock High School on Tuesday. Tempe police say they investigated the threat but deemed it not credible.
There will be increased police and security on the McClintock campus on Tuesday as a precaution.
Tempe police wanted to remind the public that interfering with or the disruption of an education institution (ARS 13-2911) is a crime as well as knowingly making a false report of an act of terrorism.