Updated: 3:45 p.m.

Follow CBSDFW.COM: Facebook | Twitter

FORT WORTH (CBSDFW.COM) – Students at Arlington Heights High School were let out after a shooting across from the campus.

A fight broke out between two students at the McDonald’s across the street from the school. One boy involved in the fight pulled out a gun and fired one shot, but the shot didn’t hit anyone. The boy was arrested. The gun has not been recovered.

As a precaution, the school went in lockout mode — no one could enter the building and no one could exit, but classes went on as normal.

The lockout was lifted at the end of the school day.

(©2015 CBS Local Media, a division of CBS Radio Inc. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)