WASHINGTON—The head of a U.S.-based Syrian advocacy organization on Monday said that a mass grave outside of Damascus contained the bodies of at least 100,000 people killed by the former government of ousted President Bashar al-Assad.
Mouaz Moustafa, speaking to Reuters in a telephone interview from Damascus, said the site at al Qutayfah, 25 miles north of the Syrian capital, was one of five mass graves that he had identified over the years.