Air strikes and artillery fire rocked the Yemeni city of Aden overnight as combatants battled for control of the main airport in fighting residents said was the worst in over a month of war.<br /><br /> Iran-allied Houthi rebels and local militiamen traded tank and mortar salvos near the airport from Wednesday evening into Thursday and warplanes from a Saudi-led coalition of Arab states bombed Houthi positions.<br /><br /> On the border with Saudi Arabia, a shell fired from Yemen killed a patrolling Saudi border guard on Thursday morning, the kingdom’s interior ministry said, bringing the number of Saudi casualties in the campaign to 11.<br /><br /> Residents said dozens of families fled, braving Houthi sniper fire and checkpoints as homes were shelled and burned.<br /><br /> “The scene is disastrous, not just in the streets where fighting is going on but inside houses where families are often trapped and terrified,” local activist Ahmed al-Awgari said.<br /><br /> “Women and children have been burnt in their homes, civilians have bee
