Satellite imagery analysts probing the deadly attack on a UN aid convoy in Syria on September 19 claim the carnage was the result of an air strike. <br /><br /> Twenty people lost their lives in the attack on the convoy at the town of Urem Al-Kubra near the northern city of Aleppo.<br /><br /> Aleppo aid convoy hit by air strike – U.N. expert https://t.co/CicfiqXyeM pic.twitter.com/1y0V6tTFT9— Reuters UK (@ReutersUK) 5 October 2016<br /><br /> UNOSAT researcher Lars Bromley said:“A giant crater on the ground is almost certainly an air-dropped munition. Then things like rockets will leave, you know, they’ll often occur in a row, whereas artillery or mortars will just kind of have a different patten.’‘ <br /><br /> The UN has not attributed blame for the attack.<br /><br /> Syrian forces continue to gain ground amid the wreckage of Aleppo and say air attacks have been much reduced.<br /><br /> Aleppo will eventually fall, but Syrian war will go on https://t.co/8jHVRxKn4K pic.twitter.com/zHT2H6LmuW— Reuters Top News (@Reuters) 5 October 2016<br /><br /> Diplomatic efforts are ongoing as France looks to frame a fresh peace initiative with foreign secretary Jean-Marc Ayrault due to visit Moscow and Washington this week.<br />