An Iranian cargo plane carrying arms and ammunition was shot down over Damascus airport by the Free Syrian Army FSA fighters .

According to FSA the cargo plane caused a huge fire as it fell over the Damascus International airport and claimed that the fired spread all the way to the passenger terminal.

Neither the Syrian authorities nor the Iranians commented on the incident according to the report which could not be independently verified.

Iran has been a key supporter of Syrian president Bashar al Assad in his 2 1/2 year crackdown against the Syrian rebels. Most of the arms and ammunition are coming from either Iran or Russia according to the activists.

Over 100,000 Syrians have been killed so far in the Syrian civil war according to UN reports