Syrian Army Closing in on Rebels in Aleppo

The rebels say they're low on ammo

Syrian rebels trying to fight off an army offensive in Aleppo said on Tuesday they were running low on ammunition as President Bashar al-Assad's forces encircled their stronghold at the southern entrance to the country's biggest city.

Assad, dealt another political blow on Monday with the defection of his prime minister, has reinforced his troops in preparation for an assault to recapture rebel-held districts of Aleppo after repelling fighters from most of Damascus.