Iraq launched an investigation after Saudi Arabia shut its East-West oil pipeline following a drone attack that the kingdom said originated from Iraq. Baghdad confirmed the attack came from its territory, dismissed the commander of Maysan province and its police chief, while an umbrella group of Iran-backed Iraqi militias denied involvement and said it would cooperate. U.S. President Donald Trump said Iran was probably responsible but sought to ease tensions, saying the Houthis had indicated they did not want a wider fight. The incident came as Iran-backed Houthi forces pressured shipping near the Bab el-Mandeb Strait and after six months of regional war had already driven concern about higher oil prices. Saudi Arabia said it would not retaliate, giving Iraq time to act. The pipeline, built in the 1980s, had become increasingly important after disruption around the Strait of Hormuz; Saudi exports through the Red Sea terminal exceeded 5 million barrels per day by early June, according to the International Energy Agency. Iraq also closed two border crossings with Iran, while diplomacy continued over shipping through Hormuz, with Bahrain refusing to join a meeting involving Iran until diplomatic relations are restored.