On Saturday, Saudi Arabia halted an important crude artery after an unmanned aerial strike launched from Iraq. The shutdown restricts 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 mounting threats from Iran and its supporters. The attack from Iraq led to the pipeline shutdown. Iraq's probe into the strikes is ongoing. The closed frontier posts with Iran form part of Iraq's response.