Le Monde newspaper has published a report by their special correspondent Jean-Philippe Remy which indicates that chemical weapons have been used by President Bashar al-Assad's regime in a number of places across Syria.
The newspaper states:
A chemical attack on the Jobar front, on the outskirts of the Syrian capital, doesn't look like anything much at first. It's not spectacular. Above all, it's not detectable. And that's the aim: by the time the rebel fighters of the Free Syrian Army who have penetrated furthest into Damascus understand that they've been exposed to chemical products by government forces, it's too late. No matter which type of gas is used, it has already produced its effects, only a few hundred meters from residential areas of the Syrian capital ...
No odor, no smoke, not even a whistle to indicate the release of a toxic gas. And then the symptoms appear. The men cough violently. Their eyes burn, their pupils shrink, their vision blurs. Soon they experience difficulty breathing, sometimes in the extreme; they begin to vomit or lose consciousness. The fighters worst affected need to be evacuated before they suffocate.
It is effective and deadly, that is why criminal Assad doesn't care, what international community think, he will use again again... Syria is shut down and close doors and gassed millions of people off the air.