On Saturday, Saudi Arabia closed an important crude artery after a drone attack fired from Iraq. The shutdown limits oil flow.
Iraq opened an investigation into the strikes and sealed three border crossings with Iran.
Yemen retaliated against Houthis. Saudi Arabia faces limited choices as it faces growing dangers from Iran and its allies. The attack from Iraq led to the pipeline shutdown. Iraq's probe into the strikes continues. The closed frontier posts with Iran are part of Iraq's response.