The Assad Regime, Sarin and the Facts"After completing its report three weeks later, the UN Report released on September 16 confirmed the use of Sarin gas in Ghouta, saying that it "collected clear and convincing evidence that surface-to-surface rockets containing the nerve agent Sarin were used… in the Ghouta area of Damascus."
Another UN Report released on February 12, 2014 noted that all evidence regarding the August 21 attack "indicated that the perpetrators likely had access to the chemical weapons stockpile of the Syrian military, as well as the expertise and equipment necessary". The inspectors on the ground also identified the surface-to-surface rockets as 140mm BM-14 rockets, which were manufactured in Russia and 330mm rockets manufactured probably by the Syrian army."