Russia, Iran jostle for influence in Syria

Tensions between Damascus’ allies are increasing as Moscow plans to expand troop presence in Syria war.

Seven years of war in Syria have created a complex battlefield that has drawn in global and regional powers.

Russia and Iran are allied to Syrian President Bashar al-Assad, but the heavy troop involvement by both countries has created tension between them.

Al Jazeera’s Zeina Khodr explains from Beirut.