Syrian rebels have left the last areas they held in Aleppo's old city, while calling for a five-day truce to allow the evacuation of civilians. <br/><br/>Activist monitoring group the Syrian Observatory for Human Rights said the pull-back in Syria's second city came after days of heavy fighting. <br/><br/>State media confirmed the military had taken over the whole of the old city. Government forces now control about 75 per cent of eastern Aleppo, held by the rebels for the past four years. <br/><br/>The rebels, who had been left with just a spit of land north-east of the citadel after recent government advances, abandoned it by this morning, retreating to territory they still hold further south.<br/><br/>In a separate development, Syrian state news agency Sana reported that several Israeli missiles struck the Mazzeh military air base outside the capital Damascus overnight, causing a fire but no casualties.