Add to ORKGUnited Nations S/2017/904 Security Council Distr.: General 26 October 2017 Original: English 17-18978 (E) 011117 *1718978* Letter dated 26 October 2017 from the Secretary-General addressed to the President of the Security Council I have the honour to convey herewith the seventh report of the Organisation for the Prohibition of Chemical Weapons-United Nations Joint Investigative Mechanism (see annex). I should be grateful if the present letter and its annex could be brought to the attention of the members of the Security Council. (Signed) António Guterre