Rights Group: Syrian Regime Behind Chemical Attack An international human rights group says evidence "strongly suggest" that Syrian government forces fired rockets with warheads containing a nerve agent into a Damascus suburb in August, killing hundreds of people there. Human Rights Watch says it has examined documents from the alleged chemical attack on Aug. 21 in Ghouta, a sprawling, rebel-held suburb of the Syrian capital. The New York-based group says the nerve agent used was "most likely, sarin." In Tuesday's report, HRW says it analyzed witness accounts and "the type of rockets and launchers used" in the attack. It also says the group's experts studied documented medical symptoms of the victims and analyzed activist videos posted on the Internet after the attack, which has brought the U.S. to the brink of a military intervention Syria's civil war.