Add to ORKGS/2016/142 10/12 16-02054 mission had determined that the incident involved or likely involved the use of chemicals as weapons. 42. A total of 116 alleged incidents of the use of chemicals as weapons in the Syrian Arab Republic are mentioned in the fact-finding mission reports and the annexes thereto published to date (S/2015/138, S/2015/908 and S/2016/85). OPCW investigated 29 of them. The Mechanism has the mandate to investigate those cases in which the fact-finding mission concluded that the incident(s) concerned lent credence to the view that toxic chemicals were used, likely involved the use of one or more chemicals, and confirmed with utmost confidence exposure to a chemical substance. This comprises the following 23 incidents, in chr...