In fact, the entire OPCW account is based on witness testimonies and material evidence provided by selected NGOs as well as medical records offered by the same questionable sources, including Belgium-based Same Justice/Chemical Violations Documentation Center of Syria (CVDCS), the notorious Syrian Civil Defense (SCD) – better known as White Helmets – and the US-based Syrian American Medical Society (SAMS), as confirmed by a former UK ambassador.
No evidence given. OPCW has previously been targeted with disinformation from Russian sources. The White Helmets have long been the target of a smear campaign promoted by the Russian and Syrian governments, as well as by conspiracy theorists in the West who typically use Russian sources like RT and Sputnik.
Furthermore, the quoted former UK ambassador has been the director of a pro-Assad lobbying group since April 2017. That group, the British Syrian Society, was founded by Fawas Akhras, Syrian President Bashar al-Assad’s father-in-law. Further debunking by Polygraph.info.