Screen Shot 2015-05-03 At 6.47.07 PmTwo gunmen were shot and killed and a school security officer was wounded at a controversial event Sunday evening in Texas. The event, billed as “Draw the Prophet” was an art exhibit of depictions of the Muslim prophet Muhammad organized by the New York-based American Freedom Defense Initiative at the Curtis Culwell Center.

The shooting happened just after 7 p.m. outside the Curtis Culwell Center in Garland, Tex., police said. About 200 people were at the venue.

An officer dressed in SWAT gear took the stage toward the end of the event at the Curtis Culwell Center in Garland and told attendees, including an Associated Press reporter, that a shooting had occurred. He said one officer and two suspects were shot. The center was locked down with people inside.

According to police, two unidentified men got out of a vehicle and started shooting at a Garland schools security officer outside the center, wounding him. Garland police officers shot back at the two men, killing them.

The AFDI, co-founded by controversial anti-Muslim activist Pamela Gellar, was hosting a contest that would award $10,000 for the best cartoon depicting the Prophet Muhammad at the venue, which is the same place she led a protest march outside a Muslim conference in January.