ABC NewsUS probes possible IS use of chlorine gas in IraqFox News LatinoSecretary of State John Kerry said Friday that the U.S. government is investigating reports Islamic State militants used chlorine gas against Iraqi security forces. "These allegations are extremely serious and we are seeking additional information in order to be ...US Probes Reports of IS Chlorine Gas AttacksVoice of AmericaIraqi Officials Say Islamic Militants Used Chlorine Gas North of BaghdadWall Street JournalDid ISIS Use Chlorine Gas in Iraq and Syria?U.S.