Syrian authorities closed Aleppo airport as well as all roads leading into the city on Saturday, three military sources told Reuters, as rebels opposed to President Bashar al-Assad said they had reached the heart of Aleppo.
The opposition fighters, led by the Islamist militant group Hayat Tahrir al-Sham, carried out a surprise sweep through government-held towns this week and reached Aleppo nearly a decade after having been forced out by Assad and his allies.