[Psalm 73]

"...Turkish military carried out a suspected gas attack..."

I think we know what the Turks have and don't have - as a "NATO" member, I do not think they have chemical weapons in their inventory.
Not that that would be below them, it's just that we would know.

[Mastador1]

I wouldn't trust Erdogan and the rest of his muslims as far as I could throw Rosie ODonnel's fat ass. And I don't doubt that he has some very nasty stuff stockpiled. Erdogan is no friend of freedom or the western world.

[Texas Fossil]

I do not think they have chemical weapons in their inventory.

The Turks employ the FSA, some ISIS stragglers and al Qaeda (Nusra). All of those have been previously accused of using poison gas. I've seen pictures of poison gas agents and chemicals that were captured by the SDF.

The Syrian SDF (YPG/YPJ) have been inflicting heavy casualties on the FSA. They did that earlier fighting them in the Area that US troops are placed farther to the East. Those heavy losses may make the FSA want to kill Kurds at any cost, with any weapon.