All of your links reference the same story printed by Bild, the German version of the National Enquirer.
Having multiple websites reference the same story doesn't verify it.
Are you worried that the veracity of this story may be proven?
Actually, I don't really give a shit about this story, or whether it's true or false.
I don't support military action either way, and the chemical weapons nonsense is nothing more than nonsense. This is about gas pipelines, not chemical weapons.
Whatever the case may be... if you don't give a shit, why are you feeling compulsed to comment on it?