(ROUGH CUT ONLY - NO REPORTER NARRATION)<br/> <br />Amateur video obtained by Reuters purports to show a Syrian military helicopter being shot down on Wednesday.<br/> <br />The video, said to be shot in the Syrian city of Idlib, showed the helicopter spiralling downwards with smoke coming from the engines before it explodes in a ball of flames.<br/> <br />In recent days it has appeared that Syrian rebels have acquired heavy weapons that have forced the government's air force to bomb rebel-held zones from higher altitude, leading to claims of more indiscriminate bombing.