Exclusive footage shows self-styled Free Syrian Army using heavy weapons as they take on former comrades.

A group of Syrian army defectors fighting against Bashar al-Assad’s government are using heavy weapons, according to exclusive footage obtained by Al Jazeera.

The group, which calls itself the Free Syrian Army, is calling on the international community to impose a no-fly zone and to arm the opposition.

Al Jazeera’s Tarek Bazley reports.