WASHINGTON — The FBI and the New York City Police Department passed information to U.S. Capitol Police about the possibility of violence during the protests Wednesday against the counting of the Electoral College vote, and the FBI even visited more than a dozen extremists already under investigation to urge them not to travel to Washington, senior law enforcement officials said.
The previously unreported details undercut the assertion by a top FBI official that officials had no indication that violence was a possibility, and they add to questions about what intelligence authorities had reviewed before the Capitol riot, which led to the death of an officer and four other people, including a rioter who was shot and killed by police.
"Social media is just part of a full intelligence picture, and while there was First Amendment-protected activity on social media to include some people making threats, to this point, investigators have not found that there was an organized plot to access the Capitol," a senior FBI official said.

It was immediately obvious after the Capitol was seized by a violent mob Wednesday that Capitol Police, whose job is to defend the facility and the lawmakers who work there, had completely misjudged the security threat. The chief of the force was quickly forced out of his job, as were other key legislative security officials.
As evidence mounts that some extremists had told the world what they had in mind through social media, questions are emerging about whether the FBI, the Department of Homeland Security and other federal agencies took the postings seriously enough — and why, if they did, they didn't step in until well after the building was under attack.
Asked Friday whether the slow police response Wednesday was the result of an intelligence failure, the official who leads the FBI's Washington field office, Steven D'Antuono, said no. "There was no indication that there was anything [planned] other than First Amendment-protected activity," he said.
D.C. Police Chief Robert Contee said something similar Thursday, telling reporters, "There was no intelligence that suggested there would be a breach of the U.S. Capitol."
Ken Rapuano, the assistant secretary of defense for homeland defense, told reporters that the Justice Department and other law enforcement officials told the Defense Department repeatedly that they had no indications that there would be "significant violent protests."
But there were ample indications of potential violence.

NBC News has reported that a digital flyer made public on Instagram and Facebook last month referred to what would happen as "Operation Occupy the Capitol."
On the fringe message board 8kun, which is popular with QAnon followers, users talked for weeks about a siege of the Capitol.
"You can go to Washington on Jan 6 and help storm the Capitol," an 8kun user said Tuesday, a day before the siege. "As many Patriots as can be. We will storm the government buildings, kill cops, kill security guards, kill federal employees and agents, and demand a recount."
Daniel J. Jones, president of Advance Democracy Inc., a global research organization that studies disinformation and extremism, told NBC News in a story published the day before the riot: "In regard to the protests planned for Jan. 6, the violent rhetoric we're seeing online is at a new level. There are endorsements of violence across all of the platforms."
How could the FBI and other agencies have missed all that? It turns out they didn't, officials said.
"Prior to this event, the FBI obtained credible and actionable information about individuals who were planning on traveling to the protests who expressed a desire to engage in violence," the senior FBI official said. "The FBI was able to discourage those individuals from traveling to D.C."

The official added that "the FBI and our federal, state and local partners collected and shared available intelligence in preparation for the various planned events."
"The FBI was prepared to adapt as needed to fluid events on the ground, including having rapid response teams in reserve," the official said. "Throughout most of the day the crowd was peaceful and nonconfrontational.
"However, when it became clear that some individuals were surging onto the Capitol grounds and entering the buildings, the U.S. Capitol Police requested assistance. Within 50 minutes of that request, three FBI tactical teams were on scene to gain control of the area and offer protection to congressional members and staff. Over the course of the evening, the FBI presence ultimately grew to over 150 agents and other personnel."








