U.S. Government Assessment of the Syrian Government’s
Use of Chemical Weapons on August 21, 2013
The United States Government assesses with high confidence that the Syrian government carried out a chemical weapons attack in the Damascus suburbs on August 21, 2013. We further assess that the regime used a nerve agent in the attack. These all-source assessments are based on human, signals, and geospatial intelligence as well as a significant body of open source reporting. Our classified assessments have been shared with the U.S. Congress and key international partners. To protect sources and methods, we cannot publicly release all available intelligence – but what follows is an unclassified summary of the U.S. Intelligence Community’s analysis of what took place.
Syrian Government Use of Chemical Weapons on August 21
A large body of independent sources indicates that a chemical weapons attack took place in the Damascus suburbs on August 21. In addition to U.S. intelligence information, there are accounts from international and Syrian medical personnel; videos; witness accounts; thousands of social media reports from at least 12 different locations in the Damascus area; journalist accounts; and reports from highly credible nongovernmental organizations.
A preliminary U.S. government assessment determined that 1,429 people were killed in the chemical weapons attack, including at least 426 children, though this assessment will certainly evolve as we obtain more information.