JACKSONVILLE, Fla. – One person was killed and two people were injured in a shooting Friday night at Raines High School in Jacksonville, where a football game had just ended, according to the Jacksonville Sheriff's Office.

News 6 news partner WJXT-TV reports the triple shooting happened about 10:00 p.m. at the school off Moncrief Road West in Northwest Jacksonville. The football game between the Vikings and the Lee High School General had ended 15 minutes prior.

The shooting happened despite heavy security at the game. The shots were fired outside the stadium near the ticket gate and the locker room, according to School District Police Director Michael Edwards.

Officers had been checking everyone entering the gates into the stadium with a metal detector.

Police have not yet released the names and ages of the victims, but City Councilman Garrett Dennis said Duval County school board members told him the person who died was a former Raines student and the two injured are current Lee High School students.

Investigators said it is too soon to know if the gunman was one of the game's 4,000 attendees.

Witnesses said at least one person could be seen being loaded into an ambulance.

Just after midnight, Dr. Diana Greene, superintendent of Duval County Public Schools, spoke with reporters at the scene, saying what happened was "unacceptable."

"This is a community issue," she said. "I need parents, students to stand up. If you see something, say something."

Greene said she and school district officials would be meeting Saturday to determine what changes need to be made. She also sent a message to parents.

Police are investigating.

Stay with News 6 and ClickOrlando.com for updates on this story.