Two men in a vehicle pulled up and opened fire at an anti-Islam event outside Dallas on Sunday, according to police. The men shot a security guard for Garland's Curtis Culwell Center where a right-wing group was hosting an event to draw Muhammad. Both gunman were killed, police said, and the security guard was wounded and taken to the hospital. The gunmen's identities and motives are not yet known. A bomb squad has arrived on the scene after reports of an explosive device, which have not been confirmed.The "Muhammad Art Exhibit and Contest" was hosted by the American Freedom Defense Initiative, led by blogger and anti-Islam activist Pamela Geller. The event gave a $10,000 prize to Bosch Fawstin for his depiction of Muhammad, The Daily Beast's Randy Potts reports. The event also featured Dutch politican Geert Wilders, who's Freedom Party campaigns against Muslim immigration.