The OPCW expressed "serious concern" over the Khan Shaykhun chemical attack and said that its Fact-Finding Mission in Syria was "gathering and analysing information from all available sources." The following day, the Technical Secretariat of the OPCW, referring to the media reports, requested all member states of the Chemical Weapons Convention to share available information on what it described preliminary as "allegations of use of chemical weapons in the Khan Shaykhun area of Idlib province in the Syrian Arab Republic."