On 16 September 2013 , the mission published a report with focus on the Ghouta chemical attack that occurred on 21 August 2013 . The next day , Åke Sellström and his team , answered questions about the report on a press conference . On 12 December 2013 , the mission delivered its final report to the U.N. Secretary-General Ban Ki-moon . The mission investigated 7 of 16 alleged chemical attacks : Normal text indicates that the mission did not find sufficient or credible information to further investigate the alleged chemical attacks
Ghouta chemical attack
Ghouta chemical attack
United Nations Mission to Investigate Alleged Uses of Chemical Weapons in the Syrian Arab Republic