Less than 24 hours into a much-awaited U.N. mission carrying aid from Turkey to Syria -- operations were halted. It's what one aid official blamed on "administrative hurdles" by the Syrian government.<br/> <br />As the relief supplies sit, new amateur video Reuters cannot independently verify purports to show Syrian rebel groups fighting to take control of a government-controlled border checkpoint with Turkey.<br/> <br />The men claim to have taken these weapons from the checkpoint.<br/> <br />Syria's conflict has has now entered its fourth year with over 140,000 people estimated to have been killed in the civil war.<br/> <br />So far, there is little sign that diplomatic initiatives to ease the crisis are working.
