See #18 for my thoughts on it
Just because it isnt mentioned widely i.e on Wikipedia who lie on many issues means nothing. He is/was a powerful guy and can scrub the internet
It’s mentioned in books and here/elsewhere!
The way embassies work is that the main embassy deals with routine business with the host government.
The consulate portion deals with boring stuff like passports and visas.
The CIA folks (presumably undercover) have a separate operation—usually in a secure area of the embassy closed to everyone else—for obvious reasons.
Normally they are three very separate operations.
This is why some folks might be a bit skeptical of CIA involvement in issuing visas. That does not mean it is impossible—just that there would need to be strong evidence to support it.
Source?