RADNOR, Pa. (WPVI) -- Police are investigating after a bullet was found inside Radnor High School on Monday.
Authorities tell Action News that a student found the bullet on the floor.
The school was placed on lockdown during a search by police dogs.
No further ammunition was found, police said. However, as a precaution, extra patrols will be around the school on Tuesday.
Colarulo also tells Action News that the school was a host site for SAT exams over the weekend, so officials are unsure if a Radnor student is responsible for the incident.
There were no injuries.