Russian offensive in Ukraine

Please keep things on topic, no politics, military aviation only.

U.S. officials added that there is proof Russia has provided advanced air defenses not known to be in the Ukrainian arsenal — and thus could not be “looted” by separatists — and routinely flies drones over head to gather intelligence for the separatists.

http://www.businessinsider.com/ukrainian-sargent-this-is-now-a-war-with-russia-2014-8

Those air defences would be the Pantsir-S1:
http://en.wikipedia.org/wiki/SA-22
That would also explain why Ukraine hasn’t yet deployed aircraft against this new attack.

Any word on those drones?