Harder. Iraqi kurds say they have evidence fighters from the Islamic State of iraq and levant are using chlorine gas. Tests prove that soil and clothing collected from the sight of a suicide blast contain the toxic chemical. Reporter the accusations have been around for months. Now they say the proof. Its these plumes of orange smoke exploding into the air which iraqi Officials Say is chlorine, and proves i. S. I. L. Fighters are using the gas against them. Iraqi fighters filmed the video near tich raid claiming i. S. I. L. Was driving an oil tanker. One of the leading experts says hes not surprised the agent is being deployed by i. S. I. L. The Islamic State was attacked in december last year using chlorine, and that stopped them in their tracks. I. S. I. L. Saw how effective chemical weapons and chlorine have been in syria, and it was a matter of time before they use themselves. In january, an attack on Peshmerga Forces contained levels of the chemical ate. A lorry loaded with gas ca