The Organisation for the Prohibition of Chemical Weapons said on April 19 that autopsies of the victims of the Khan Sheikhun attack showed the presence of sarin or a sarin-like substance.

“The results of these analyses from four OPCW designated laboratories indicate exposure to Sarin or a Sarin like substance. While further details of the laboratory analyses will follow, the analytical results already obtained are incontrovertible,” OPCW Director-General Ahmet Üzümcü said.

Biomedical samples collected from three victims’ autopsies and seven living individuals showed they were exposed to sarin or a sarin-like substance.

The fact-finding mission will submit its first report to the States Parties of the Chemical Weapons Convention within two weeks, and a report will be made available to the OPCW-UN joint mission.

On April 13, the British delegation to the OPCW said samples tested by UK scientists had tested positive for sarin or a sarin-like substance.