The Islamic State militant group is claiming responsibility for Sunday's attack outside a building near Dallas, Texas, where an exhibition of cartoons depicting Islam's Prophet Muhammad was taking place.
Police shot and killed two men after they opened fire on a security officer outside a suburban Dallas venue that was hosting a provocative exhibit of Prophet Muhammad cartoons Sunday night, authorities said.
FBI crime scene investigators document the area around two deceased gunmen and their vehicle, outside the Curtis Culwell Center in Garland, Texas, May 4, 2015.
An FBI crime scene investigator examines the site where two gunmen were killed in a shootout with police, near the Curtis Culwell Center in Garland, Texas, May 4, 2015.
An aerial view shows a car that was used the previous night by two gunmen, who were killed by police, as it is investigated by local police and the FBI in Garland, Texas May 4, 2015.