Current and former staff members of the Organization for the Prohibition of Chemical Weapons (OPCW) have denounced the group's IIT report alleging Syrian government sarin use at Ltamenah, criticizing its reliance on rumor, hearsay, “scientifically flawed” claims, and the influence of unqualified, secret “experts” aligned with the Western-backed opposition.

https://thegrayzone.com/2020/04/28/opcw-insiders-ltamenah-chemical-weapons-report/