There is growing tension between Iran and Saudi Arabia after the Yemeni capital Sanaa was again bombarded by Saudi-led forces.<br /><br /> Black smoke rose from the airport after warplanes attacked it, destroying what Shi’ite Houthi rebels said was a private jet.<br /><br /> The airstrikes were reportedly aimed at stopping an Iranian plane from landing.<br /><br /> Iran says it was carrying medical supplies and flew home.<br /><br /> A month of airstrikes have targeted the Houthis, who control Sanaa and most of western Yemen and are supported by Iran. <br /><br /> But Tehran denies claims by the US, Saudi Arabia and their allies that it is arming the rebels.<br /><br /> With the airport runway unusable, planned aid flights have been suspended.<br /><br /> Relief workers have warned that the situation in the Arab world’s poorest country is a humanitarian catastrophe.<br /><br /> As the coalition targeted the homes of Houthi commanders, fighting has continued between the rebels and forces loyal to Yemen’s government in exile.<br /><br /> Iran has cranked up the rhetoric again
