FALLBROOK–Fallbrook High School Friday was on lockdown after a student reportedly saw a social media post of a photo of a student holding a gun in a school restroom.

Three Fallbrook High School students were arrested on suspicion of bringing a loaded gun to school. Two of the students are 15-years-old and one is 14-years-old. It is the policy of the Sheriff’s Department not to release further information about juvenile arrestees.

Deputies were called just after 10 a.m. to the school, located in 2400 block of South Stage Coach Lane.

Once deputies arrived, the school was placed on lockdown for the safety of the students and staff. The investigation led deputies to students who had information of where the gun might be located. A Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) K-9 specially trained to find weapons was called in to help with the search. The gun was eventually found hidden in a classroom.

After the gun was located, the lockdown was lifted and students were allowed to go home for the day. No one was hurt.

The investigation continues and there could be more arrests.