On November 24, 2018, the Assad regime and Russia falsely accused the opposition and extremist groups of conducting a chlorine attack in northwestern Aleppo. The United States strongly refutes this narrative and has credible information that pro-regime forces likely used teargas against civilians in Aleppo on November 24. The United States has information indicating Russian and Syrian personnel were involved in the teargas incident, and believes that both countries are using it as an opportunity to undermine confidence in the ceasefire in Idlib.
The United States is deeply concerned that pro-regime officials have maintained control of the attack site in its immediate aftermath, allowing them to potentially fabricate samples and contaminate the site before a proper investigation of it by the Organization for the Prohibition of Chemical Weapons. We caution Russia and the regime against tampering with the suspected attack site and urge them to secure the safety of impartial, independent inspectors so that those responsible can be held accountable.