NPR has reviewed court documents of 51 individuals facing federal charges in connection with the unrest. As of Tuesday morning, none is alleged to have links to the antifa movement.

Of the cases brought so far, 20 involve allegations related to arson; 16 involve the illegal possession of a firearm, more often than not by a felon; another eight people face charges related to inciting a riot or civil disorder.

The single instance in which an extremist group is mentioned in court documents is a case against three Nevada men. Federal prosecutors allege the trio belong to the right-wing Boogaloo movement that wants to bring about a civil war. The men have been charged with plotting violence during Las Vegas protests.