Spain has closed its airspace to U.S. planes involved in the Iran war, Defense Minister Margarita Robles said Monday, marking another step in the country’s opposition to the U.S. and Israel’s conflict in the Middle East.

Spain had already said the U.S. could not use jointly operated military bases in the Iran conflict, which Spanish Prime Minister Pedro Sánchez has described as illegal, reckless and unjust.

Defense Minister Robles said Monday the same logic applied to the use of Spanish airspace in the conflict.