Inflation in the euro zone's four largest economies hovered above the European Central Bank's 2% target for a third straight month in May, preliminary data showed on Friday, as a rise in fuel costs triggered by the Iran war began to feed through to other prices. Readings from France, Italy, Spain and Germany are likely to cement the case for a rate hike from the European Central Bank next month and stoke some worries about whether high inflation is beginning to take root in the euro zone.