Inconsistencies over the death toll and other details related to the attack also have fueled doubts among skeptics.
The Obama administration says 1,429 people died in 12 locations mostly east of the capital, an estimate close to the one put out by the Western-backed Syrian National Coalition. When asked for victims’ names, however, the group provided a list of 395. On that list, some of the victims were identified by a first name only or said to be members of a certain family. There was no explanation for the hundreds of missing names.
In Ghouta, Majed Abu Ali, a spokesman for 17 clinics and field hospitals near Damascus, produced the same list, saying the hospitals were unable to identify all the dead.
Casualty estimates by other groups are far lower: The Britain-based Syrian Observatory for Human Rights says it only counts victims identified by name, and that its current total stands at 502. It has questioned the U.S. number and urged the Obama administration to release the information its figure is based on. The AP also has repeatedly asked for clarification on those numbers.
The humanitarian group Doctors Without Borders says it has not been able to update its initial Aug. 24 estimate of 355 killed because communication with those on the ground around Damascus is difficult. That estimate was based on reports from three hospitals in the area supported by the group.