Chemical weapons inspectors said they found evidence that chlorine was used in the April 7 attack in Douma, Syria, that left dozens of civilians dead.
The Organisation for the Prohibition of Chemical Weapons said in an interim report issued July 6 that its fact-finding team also found explosive residues and two industrial gas cylinders in the wreckage of an apartment building. They found no evidence of nerve agents.
The Syrian regime, which was recapturing Douma from rebels, has denied carrying out a chemical attack. But the government drew widespread condemnation, and the United States, the United Kingdom and France launched missile strikes April 14 against military targets.