Photos: 2 killed outside Texas cartoon contest

Garland Police officer Joe Harn speaks to media across from a blocked street after two men drove up and starting shooting at a security guard as the Dutch parliamentarian and leader of far-right Party for Freedom, Geert Wilders, delivered a keynote address at the Muhammad Art Exhibit and Contest at the Curtis Culwell Center in Garland, Texas.   (Larry W. Smith / EPA)

Garland Police spokesperson Joe Harn pauses as he addresses media about the shooting at the Curtis Culwell Center where a provocative contest for cartoon depictions of the Prophet Muhammad was held Sunday, May 3, 2015, in Garland, Texas.   (LM Otero / AP)

Garland Police blocked a street after two men drove up and starting shooting at a security guard as the Dutch parliamentarian and leader of far-right Party for Freedom, Geert Wilders, delivered a keynote address at the Muhammad Art Exhibit and Contest at the Curtis Culwell Center in Garland, Texas.   (Larry W. Smith / EPA)

Police gather in Garland, Texas, after two gunmen were shot dead outside a Prophet Mohammed cartoon contest put on by a group that has a history of sparking controversy with its statements on Islam.   (Jared L. Christopher, AFP/Getty Images)

Members of the Garland Police Department stand guard inside the Curtis Culwell Center on May 3, 2015, in Garland, Texas.   (Nomaan Merchant / AP)