The intelligence assessment, which has been seen by the FT, provides no evidence for the claims, which it says are based on smartphone intercepts and captured identity cards.
They aren't saying there is no evidence, because they would be patently false. They are saying the claims are "unproven."
The US Sec State said the classified intelligence provided to the US was "highly credible" and the house and the house vice chair of foreign affairs said it was "irrefutable."
It included phone meta data, location data, texts, and social media posts and messages.