PHILADELPHIA (CBS) — A gun was found inside a Philadelphia school, a school official told CBS 3.

A MasterPiece Arms 9mm gun turned up Monday inside a locker at the Walter D. Palmer Leadership Partners Charter School in Frankford.

READ MORE: Temple University Student Samuel Sean Collington Killed In Off-Campus Shooting In North Philadelphia

Officials changing locker combinations found the gun.

READ MORE: Philadelphia City Council Set To Hold Hearing Over SEPTA Safety Concerns Monday

No students were in the school at the time.

It’s unclear how long the gun had been there.

MORE NEWS: Philadelphia Police: Homeowner Shoots Intruder Inside Holmesburg Home

You may also be interested in these stories:
[display-posts category=”news” wrapper=”ul” posts_per_page=”5″]