29 November, 2018 – At around midnight on 24 November 2018, WHO received unconfirmed reports of patients arriving in health facilities in Aleppo with symptoms that might be consistent with exposure to chemical agents. At approximately the same time, the United Nations Department of Safety and Security office in Syria reported unconfirmed information that the Al-Zahraa, Al-Khaldiyyeh and Nile Street areas of Aleppo city had been shelled with rounds of mortar fire that included an unknown type of gas. According to unconfirmed reports, dozens of patients were being admitted to Aleppo’s two public hospitals.