S/2017/904 17-18978 3/33 Enclosure Seventh report of the Organisation for the Prohibition of Chemical Weapons-United Nations Joint Investigative Mechanism I. Introduction 1. The seventh report of the Organisation for the Prohibition of Chemical Weapons (OPCW)-United Nations Joint Investigative Mechanism is submitted pursuant to Security Council resolutions 2235 (2015) and 2319 (2016). It covers the period from 23 June 2017, when the sixth report of the Mechanism (see S/2017/552) was submitted to the Council, to 25 October 2017. II. Background 2. As set forth in resolutions 2235 (2015) and 2319 (2016), the mandate of the Mechanism is to identify, to the greatest extent feasible, individuals, entities, groups or Governments who were perpetrat...