A new report by CNN finds that Saudi Arabia gave U.S.-made weapons to al-Qaeda-linked fighters and other militant factions in Yemen, in violation of a U.S.-Saudi arms deal. Some arms may have also made their way into the hands of Iranian-backed Houthi rebels. Saudi Arabia and the United Arab Emirates are using the weapons to buy the loyalties of various militias or tribes and gain influence in Yemen’s political landscape, according to the report. A U.S. defense official confirmed to CNN there is an ongoing investigation into the matter.