NEW : The nuns are mobbed by crowds as they arrive in a Syrian - Lebanon border crossing . Meanwhile , on Sunday four rescue workers who rushed to help survivors of a barrel bomb attack in the city of Aleppo became victims themselves when more of the crude explosive devices were dropped by government helicopters , according to the Aleppo Media Center , a communication outlet run by rebels fighting to oust al-Assad . Nuns and nuns kidnapped last were reportedly freed , pro - Syrian regime media say . Lebanese according to state news : Nuns freed in exchange for Syrian prisoners ' release . Christians make up 10 % of Syria 's population ; many back al - Assad , fear Islamist militants .
NEW : The nuns are mobbed by crowds as they arrive in a Syrian - Lebanon border crossing . Nuns and nuns kidnapped last were reportedly freed , pro - Syrian regime media say . Lebanese according to state news : Nuns freed in exchange for Syrian prisoners ' release . Christians make up 10 % of Syria 's population ; many back al - Assad , fear Islamist militants .