An Organisation for the Prohibition of Chemical Weapons (OPCW) fact-finding mission confirmed in June that people in Khan Sheikhoun were exposed to Sarin on 4 April. The Syrian president denies using chemical weapons on his own people.
Since the Syrian civil war began in 2011, United Nations investigators have released 14 reports alleging 33 chemical weapons attacks - 27 by the government including 7 between March 1 and July 7.
This includes the use of sarin gas in Khan Sheikhoun, Syria in April that killed at least 83 people.
"Government forces continued to deliberately target civilians, including through the use of chemical weapons against civilians in opposition-held areas".
The commission also said the United States violated global law by failing to protect civilians when they carried out an airstrike on a mosque in al-Jinah, Syria.
"In al-Jina, Aleppo, forces of the United States of America failed to take all feasible precautions to protect civilians and civilian objects when attacking a mosque, in violation of worldwide humanitarian law", stated the report, adding that about two dozen people were killed.
Twenty-seven were by President Bashar al-Assad's forces, including seven between March 1 to July 7.
That attack led U.S. President Donald Trump to launch the first U.S. air strikes on a Syrian air base. It said its strikes in Khan Sheikhun hit a weapons depot belonging to rebel forces, a claim "excluded" by commission Chairman Paulo Pinheiro at a news conference in Geneva. The report is based on information retrieved from satellite images, video, photos, medical records, and over 300 interviews. His apologists can try to wiggle away from Obama's culpability, but the fact of the matter is that Obama made the decision not to take out Syria's chemical weapons supply and then made a ridiculous deal with Syria's ally Russian Federation to have the stockpile removed. Following that guarantee, Syria's military dropped chlorine bombs on civilians.
"Reporting on such heinous crimes and violations is the core of our work", said the Commission Chair, adding that the panel has a duty to attribute responsibility accordingly, regardless of the perpetrator. But the media - ignoring the unprecedented withdrawal of a redline which severely damaged United States credibility - played along with the fiction and thousands of Syrian civilians died.
Since the April 6 attack on the Syrian airbase, the Trump administration has changed direction in Syria in promising Russia, Assad's staunch ally, to end a covert Central Intelligence Agency program that armed opposition forces there.