US aviation regulator FAA has also asked all US airlines to stop operating in the airspace over Iraq, Iran, and the waters of the Persian Gulf and the Gulf of Oman
Asked about the consequence of "an American or Saudi military strike on Iran" in an interview with CNN aired on Thursday, Mohammad Javad Zarif responded: "An all-out war"
No group immediately claimed responsibility for the assault in Ahvaz, which saw gunfire spray into a crowd of marching Guardsmen, bystanders and government officials watching from a nearby riser