Department of Justice officials on Tuesday said they are looking at felony sedition charges for people who stormed the Capitol.
"We're looking at significant felony cases tied to sedition and conspiracy," acting United States Attorney for the District of Columbia Michael Sherwin told reporters.
"And these are significant charges that have felonies with a prison terms of up to 20 years," he added.
The DOJ has opened more than 170 subject files, Sherwin said, meaning they have identified 170 people who they will accuse in court of committing a crime at the Capitol. DOJ has separately already filed charged 70 cases, he said.
FBI Washington Field Office Assistant Director in Charge Steven D'Antuono acknowledged that the FBI had in fact developed "some intelligence that a number of individuals" were planning to come to D.C. to cause violence.
The Washington Post first reported that an internal situation report from the FBI's Norfolk, Virginia, field office warned of chatter from extremists planning to come to Washington on Jan. 6 to commit violence and "war."
"Like I said in my statement, we deal in specifics and facts, that information when my office -- in the (Washington Field Office) -- received that information, we briefed that within 40 minutes to our law enforcement partners -- our federal and state law enforcement partners -- and we had our command post and it was ingested into our (Joint Terrorism Task Force) system. It was, again, shared with all our law enforcement partners," D'Antuono said.
D'Antuono said the info was immediately shared and action was taken, as evidenced by the arrest of the Proud Boys co-founder two nights before the rally.
"Upon his arrest, he was found to be in possession of two high-capacity firearm magazines and charged accordingly with that offense as well," a Metropolitan Police Department spokesman told ABC News.
Sherwin said the scale of the FBI and DOJ's investigation is "unprecedented" in scope, with thousands of potential witnesses and hundreds of potential criminal cases to be opened.
D'Antuono also responded to Sen. Chuck Schumer's call for the FBI to put individuals involved in last week's attack on the 'No-Fly' list, saying it was something they were "actively looking at."
"As for the No Fly List, we look at all tools and techniques that we possibly can use within the FBI, and that is something that we are actively looking at."
Officials were also asked about potential pipe bombs that were found outside of the RNC and DNC -- Sherwin said they are looking at those as well.
"What was the purpose of those devices being planted, was it a diversionary type of tactic used by some of these rioters? Did they have some other type of nefarious purpose? So that is what the (Bureau of Alcohol, Tobacco, Firearms and Explosives), the FBI, MPD are looking at as we speak," Sherwin said. "The range of criminal conduct is really, I think, again, unmatched in any type of scenario that we've seen the FBI or DOJ."