Ministers from eight Islamic and European countries gathered in Istanbul and issued a warning to the United States and Israel. Their message was that any new military attack on Iran would expand the war and drive up oil prices. In their own words, they agreed that a fresh assault would widen the war and the conflict across the region. The meeting brought together governments from two continents with a shared stake in keeping the confrontation from spreading. Oil markets have been nervous about the rising tension, and the ministers pointed to the economic cost of another strike. The statement was aimed at the two governments with the means to launch such an operation. The group left Istanbul pitching restraint as the only workable option.