and BBC News
reference a video that was posted online which shows the chopper in flames and out of control before crashing near a mosque. Rebels in the background of the video (see the raw footage below) are heard shouting out "Allahu Akbar!" as the helicopter went down nearby.
As of writing the authenticity of this video has yet to be independently verified.
Rumours have spread in recent weeks that the rebels -- which are believed to be relatively lightly armed
-- have been provided with Stinger missiles
, portable MANPAD weapons that are used to shoot down low flying aircraft.
This comes after Assads forces have been increasing their use of air power against the rebels across the country.
Rebels previously claimed to have shot down
a Syrian Air Force MiG-23 Flogger jet fighter last month, however the regime contested this claim claiming it was a crash as a result of a technical malfunction.
Activists claim that this latest air crash incident in Damascus comes after heavy fighting broke out between the rebel and regime forces in the Jobar area of the Syrian capital, where they claim the helicopter was attempting to bombard their positions.