The Deir Ezzor event involved a helicopter; any US weapons used could have come from almost anywhere.
I was relying on my memory. Is this the event you were talking about? This is not the original article I read, but this is photo I remember.
http://www.english.iswnews.com/1135/militia-shoot-down-a-russian-su-25-jet-over-saraqeb/
It is not specifically in the Deir Ezzor area. That might have been my point of confusion. (or just my age? smile)