[hardspunned]

There is no doubt the CIA is involved. When I saw the initial warning to Americans and Brits in Moscow 3/7, my first thought was CIA. I really didn’t think they could be that reckless and stupid. Never underestimate the CIA’s recklessness or stupidity.

[RAldrich]

Whether you believe the current Russian charges or not, the Russians know their history.
See Afghanistan in the 1980’s, when the Russians were trying to maintain a presence there and the CIA was supporting the Mujahedeen, including Al-Qaeda and Osama bin Laden.
Or Syria during the Obama Administration when the CIA was funneling weapons to Al Nusra and other Islamist groups in order to try to topple Assad.
So, despite disclaimers from the US, the Russian charges are not all that incredible.