A subsequent US, UK and France missile strike against Syria was based on a YouTube clip, even though the Russian soldiers and journalists, the first on site, established there was no chemical attack.
Repeating recurring pro-Kremlin disinformation on chemical attack in Douma, Syria. euvsdisinfo.eu/disinformation-cases/?text=douma&disinfo_issue=&date=, , euvsdisinfo.eu/disinformation-cases/?text=white+helmets&disinfo_issue=&date=,
In the end of the story, Vesti Nedeli has interviewed a man who claims that he assisted in the filming of the fake chemical attack. The story is illustrated with pictures that in fact were published in Global Times in 2016, and are behind-the-scenes pictures from a film with which a Syrian-born film-maker "wanted to attract the world’s attention to the real-life stories of the victims of the 2013 sarin gas attack." Further debunking by the Insider and TV Dozhd.
On 7 April 2018, a high number of civilians were killed in the besieged Syrian city of Douma, with evidence pointing towards another chemical attack by the regime, according to the EU.
See also Bellingcat's open source survey on the suspected chemical attack: https://www.bellingcat.com/news/mena/2018/04/11/open-source-survey-alleged-chemical-attacks-douma-7th-april-2018/
On April 10 Russia vetoed a U.S.-drafted U.N. Security Council resolution that would have created a new inquiry to ascertain responsibility for chemical weapons attacks in Syria.
UN-OPCW Joint Investigative Mechanism found Syria’s Government responsible for last year’s attack in Khan Shaykhun.
In September 2017, the UN Commission of Inquiry on the Syrian Arab Republic summarized 33 separate incidents where it had found use of chemical weapons. Since then there have been several additional suspected chemical attacks. Between March 2013 and March 2017, the Commission documented 25 incidents of chemical weapons use in the Syrian Arab Republic, of which 20 were proven to have been perpetrated by government forces and used primarily against civilians.