French medical charity Medecins Sans Frontieres (MSF) has said they were certain a neurotoxic agent was used in Syria after an alleged chemical attack in a suburb of Damascus.
MSF France President Mego Terzian said he was "almost certain" a neurotoxic agent had been used on the victims but could not say who was responsible for the attacks.
Britain has directly accused the Assad regime of gassing hundreds of Syrian civilians amid warnings only 48 hours remain to find proof.
New videos show the eyewitness accounts of four men who witnessed an alleged chemical attack on Zamalka, a suburb of Damascus.
These are the images of the remains of rockets which, according to the men stood by them, delivered poisonous gas to a suburb of Damascus.