All I know is the Syrians have said that ISIS commanders have been whisked away at the last moment as their forces closed in by what could only be US military helicopters among other things like the US sending aid to "moderate rebels" which always ended up in ISIS hands.

Definitive links that aren't just claims are going to be hard to come by. The western press wouldn't even air those so finding anything English speaking will likely be a challenge, just the same if anyone has anything I'd also like to see it.