Washington Post: Capitol Police intelligence report warned of violence targeting 'Congress itself' three days before attack - CNN

"This combined with Stop the Steal's propensity to attract white supremacists, militia members and others who actively promote violence, may lead to a significantly dangerous situation for law enforcement and the general public alike."

Two people familiar with the intelligence memo told the Post that the intelligence division's director, Jack Donohue, shared the report with all Capitol Police command staff.

The intelligence report spurred the Capitol Police chief to pursue emergency activation of the National Guard and prompted the department to widen its perimeter barricades, a law enforcement official told the Post.

Former Capitol Police chief Steven Sund, who resigned in the aftermath of the attack on the Capitol, told the Post on Friday that the intelligence units reports informed preparation of security, but he declined to discuss an internal memo.

One law enforcement official told the Post that the internal perception of the memo wasn't that it was warning of some new threat with thousands of rioters attacking the Capitol, but rather of events similar to those the department had previously handled at smaller Trump rallies late last year.

The Post reports that the intelligence memo is not known to have been widely circulated with other branches of law enforcement, such as the FBI, or outside the Capitol Police force.