Two gunmen were confirmed dead Sunday evening after they opened fire at an art exhibit at the Curtis Culwell Center in Garland ISD.

According to the City of Garland Facebook page, two males drove up to the front of the Culwell Center building and began shooting at a Garland ISD security officer.

“Both males were armed and began shooting at a Garland ISD security officer,” according to a statement on the Facebook page. “The GISD security officer’s injuries are not life-threatening. Garland Police officers engaged the gunmen, who were both shot and killed.”

The security officer has been released from the hospital following treatment of his injuries. Businesses surrounding the center, including Academy Sports, Walmart and Sam’s Club were evacuated along with the art exhibit attendees.

The exhibit ignited controversy for running a contest offering $10,000 for the best cartoon depicting the Prophet Muhammed — caricatures which many Muslims considered offensive to their religion.

Event organizers paid an additional $10,000 for an additional 40 officers to work event security, but the main controversy surrounding the exhibit was that Garland ISD agreed to rent out the Culwell Center for the event.

The gunmen have not been identified yet.