The report offers some of the strongest evidence yet of allegations that President Bashar Assad's forces conducted the April 4 attack on Khan Sheikhoun in rebel-held Idlib province.
The UN report noted that "in its investigation, the Commission considered and investigated all potential scenarios, including claims put forward by Russian and Syrian officials", but had found "no evidence to support the claim" that rebel groups were behind the attack. But that conclusion, reached by a fact-finding mission of the Organization for the Prohibition of Chemical Weapons (OPCW), did not say who carried it out.
The OPCW confirmed in June that Sarin was used, but it did not state who was behind the attack.
The UN is accusing the Syrian government in using chemical weapons earlier in April in the country's Idlib province the Washington Post reported.
United Nations investigators said that so far, 33 chemical weapons attacks have been recorded in Syria since the civil war broke out; 27 were carried out by Assad's forces, while it is still unclear who was behind the other 6 attacks. The report stated it was not able to identify perpetrators of the six other attacks.
The regime accepted that it had attacked the town but said the gas was released after its aircraft targeted a chemical weapons factory.
This includes the use of sarin gas in Khan Sheikhoun, Syria in April that killed at least 83 people. The strikes did little to impede Assad's forces.
LSU coach Ed Orgeron to keep suspensions, discipline in-house
Both teams finished the first quarter with zeros on the scoreboard, but it was all LSU after that. The Tigers outgained BYU (1-1) 479 yards to 97 and LSU had the ball for 41:54 to 18:06 for BYU.
That attack led U.S. President Donald Trump to launch the first U.S. air strikes on a Syrian air base.
The report is the 14th by the commission and covers events from March to early July, based on interviews with Syrians, satellite images and examinations of photos and videos.
Most of the dead from these attacks are directly on the head of Barack Obama.
The attack was the latest in a string of chemical strikes since the Syrian conflict began in March 2011.
August 25, 2015: Syrian rebels and activists say they documented a chemical weapons attack on August 21 in the rebel stronghold of Marea in northern Aleppo, affecting dozens of people.
As well as the use of chemical weapons, brutal tactics pursued mainly by the regime have included sieges, mass executions and torture against civilians, leading to war crimes investigations. But the media - ignoring the unprecedented withdrawal of a redline which severely damaged USA 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.