Officers recovered the gun and took two students in for questioning.
Philadelphia police are investigating after a gun was found in the bathroom at an elementary school on Monday morning.
Officials say the two women were hit by the same bullet, one was struck in the thigh and the other in the ankle.
It happened at approximately 10 p.m. at a campus event called Yardfest.
The teen is facing felony reckless endangerment and weapons charges. He's being held on $98,000 cash bond.