REVEALED: Police warned Secret Service that Trump supporters might 'come armed' on Jan. 6

A newly uncovered email shows that Washington's Metropolitan Police Department warned federal law enforcement agencies on Jan. 5 that Donald Trump supporters who planned to attend his "Stop the Steal" rally the following day were being urged on social media to "come armed."

"Social media reporting is urging individuals attending the events on January 6 to come armed. No threats have been identified," the email stated.

CNN reported Thursday that the email "provides additional evidence that law enforcement dramatically misread the situation in the critical days before the riot," adding that the document "could prove useful to a House committee investigating the riot."

The email, obtained by the watchdog group Citizens for Responsibility and Ethics in Washington (CREW), was sent from the FBI's field office in DC to the Secret Service, according to CNN. It provided a short summary of a Metropolitan Police Department briefing.

"The email noted that eight firearms were recovered and five arrests were made at a pro-Trump event in November 2020," CNN reported. "Further, the document shows how local law enforcement knew DC-area hotels were sold out, indicating that a large crowd would be in the city around that time. The extremist Proud Boys group is also highlighted in the document, although it says 'the number expected' to attend the rally was 'unknown.'"

The email is among numerous documents uncovered recently that suggest the Capitol insurrection was not an intelligence failure.