A Texas private university says it will add armed and unarmed security to shuttle buses following a shooting incident that occurred on campus Tuesday morning.

Texas Christian University (TCU) does not allow concealed carry on campus. As a privately owned university, it chose to opt out of the law that allows people with a Texas License to Carry to carry a concealed handgun on campus.

On Tuesday morning, gunfire erupted after an argument between two campus shuttle bus drivers got out of hand. One driver received minor injuries after a second driver pulled a handgun fired in his direction, the Fort Worth Star-Telegram reported on Tuesday. The injury occurred as the alleged shooter fled in his shuttle bus which “bumped” the second driver.

Assistant Vice Chancellor of Public Safety Adrian Andrews told reporters that only police officers are allowed to carry firearms on campus. The news that a Roadrunner shuttle driver was armed came as a shock to school officials.

University officials said they will be placing armed and unarmed guards on the shuttles for at least the next couple of weeks. Officials will also address the policy matter with Roadrunner, the private company that operates the shuttle buses for TCU.

The school placed students at TCU on lockdown immediately following the incident which occurred early Tuesday morning. By 8:45 a.m., police arrested the driver and the lockdown had been lifted.

Two shuttle drivers got into an argument, Fort Worth Police Department spokesman Bradley Perez told reporters.

Police have not released the name of the alleged shooter. An ambulance transported the other driver to a local hospital where he received treatment for minor injuries.

Officials stated the alleged shooter will be charged with aggravated assault, a felony.

Breitbart Texas reached out to TCU officials to learn if the alleged shooter has a Texas License to Carry. No response was immediately available.