"Two of the soldiers of the caliphate executed an attack on an art exhibit in Garland, Texas, and this exhibit was portraying negative pictures of the Prophet Muhammad (pbuh)," the militant group said.Police shot dead two gunmen on Monday outside a Prophet Muhammad (phub) cartoon contest in Texas attended by Dutch far-right politician Geert Wilders, authorities said.The right-wing American Freedom Defense Initiative (AFDI) organized the event in a suburb of Dallas, featuring Wilders, who has been outspoken against Muslims and is targeted by radical groups.Police said two men drove up to the conference center in Garland, Texas, and began shooting at a security guard.“Garland Police officers engaged the gunmen, who were both shot and killed,” the city of Garland said in a statement.The security guard was shot in the ankle and was treated at a hospital and released, the city said.