From Ken Klippenstein, an intrepid reporter with good sources, in The Nation.
The FBI report states that “based on CHS [Confidential Human Source] canvassing, open source/social media partner engagement, and liaison, FBI WFO has no intelligence indicating Antifa involvement/presence.” The statement followed a list of violent acts like throwing bricks at police and the discovery of a backpack containing explosive materials, which were flagged by the FBI under a “Key Updates” section of the report. The FBI has been issuing such reports daily since the weekend, according to a Bureau source, who added that none of these documents contained any evidence of antifa violence.
Source: The FBI Finds ‘No Intel Indicating Antifa Involvement’ in Sunday’s Violence | The Nation