Police in Antioch on Thursday arrested a student at Antioch High School in connection with possession of a firearm magazine on school grounds.
On Thursday at 10:18 a.m., Antioch High School staff notified the Antioch Police Department three individuals on campus were possibly armed with weapons.
School staff placed the school on lockdown, and police responded to help try and locate the individuals.
Ultimately, the information provided by another student could not be substantiated, and the lockdown was lifted once the school was determined to be safe.
While the officers were on campus, an unloaded pistol magazine was located in the possession of a student.
The student was detained and arrested on suspicion of possessing a firearm magazine on school grounds.