JACKSONVILLE, Fla. -

A student at Stanton College Preparatory School was grazed by a bullet that ricocheted off the bleachers on the school's football field Friday afternoon.

Jacksonville police were called to West 13th Street and Moncrief Road in Northwest Jacksonville after gunshots were heard off campus about 10:30 a.m.

The girl was on the field on school grounds when she was grazed by the bullet. She did not need treatment.

Police said it's unknown who fired the shots or the scenario that led to the gunfire.

The school was put on lockdown, but students said they kept on working.

"They announced over the intercom that there was a Code Red," student Torin Rukab said. "We all just kind of looked around a little bit for a couple minutes and we just kept writing essays."

If you have any information about the gunfire, call Crime Stoppers at 866-845-TIPS.