According to police, the First Philadelphia Preparatory Charter School in the city's Frankford section was placed on lockdown at about 9:57 a.m. after a parent received a call from her daughter saying a student had a gun inside.
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According to a statement from the school, a gun was found in a student's backpack.
"All students, faculty, and staff remained safe and secure, and immediate action was taken. The school was placed on lockdown and the Philadelphia Police Department was called to the scene, the campus remains secure," the statement said.
"The safety of our students and everyone within our school is paramount and will always remain our number one focus. We thank our faculty and staff for their diligence here."
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The lockdown the lifted by 12:30 p.m.
A previous version of this story said students were being dismissed early, but a school official said students will be dismissed at their regular time.
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