On Saturday, Saudi Arabia halted a major oil link after a drone attack fired from Iraq. The shutdown restricts oil flow.
Iraq opened an investigation into the strikes and sealed three border crossings with Iran.
Yemen hit back against Houthis. Saudi Arabia has few options as it confronts mounting threats from Iran and its allies. The attack from Iraq triggered the pipeline shutdown. Iraq's probe into the strikes is ongoing. The closed frontier posts with Iran form part of Iraq's response.