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Photo: Eric Baradat/AFP via Getty Images

The FBI and Department of Homeland Security predict violent domestic extremists attacks will increase in 2021, according to a report obtained by Axios.

Driving the news: The joint report says extremists have discussed plans to take control of the Capitol and "remove Democratic lawmakers" on or about March 4. The House canceled its plans for Thursday votes as word of the possible threats spread.

  • The extremist group is unidentified in the report, but Capitol police told congressional staffers the FBI has intelligence that it's the Three Percenters militia group, according to a person present during the briefing.
  • The FBI and Capitol Police aren't aware of any increase in hotel reservations in D.C. or flight reservations to the area, but Capitol Police are conducting intelligence briefings for officers and going to an “all hands” schedule (no days off) through March 6, the source said.

The big picture: The report lists government and law enforcement as possible targets by extremist groups who may exploit public gatherings to engage in violence.

  • It says the groups are motivated by election fraud and other conspiracy theories around the presidential transition.
  • The report cited a QAnon conspiracy theory that former President Donald Trump will be inaugurated on March 4 — the date of the possible attack plansor return to power on May 20 with the help of the U.S. military.
  • It says extremist groups have also allegedly threatened to use explosives "to kill as many members as possible" during the upcoming State of the Union.
  • The extremists were likely emboldened by the Jan. 6 Capitol building breach, according to the report.

Between the lines: Law enforcement is also warning about extremists turning to encrypted communications after mass purges from social media platforms after Jan. 6.

  • Law enforcement's insight into threats is "increasingly constrained" by the use of secure communications by extremists, according to the report.

The bottom line: Capitol Police released a statement Wednesday morning acknowledging the increased threat to members and the Capitol grounds.

  • "We have obtained intelligence that shows a possible plot to breach the Capitol by an identified militia group on Thursday, March 4," the statement reads.
  • "We have already made significant security upgrades to include establishing a physical structure and increasing manpower to ensure the protection of Congress, the public and our police officers."

This story has been updated with new details on the Capitol threat and a link to the full report.

Go deeper

Updated Mar 3, 2021 - Politics & Policy

Capitol Police warns of attack by "an identified militia group" on March 4

Pro-Trump rioters break into U.S. Capitol on Jan. 6. Photo: Win McNamee/Getty Images

U.S. Capitol Police issued a statement on Wednesday announcing additional security measures after it obtained intelligence showing "a possible plot to breach the Capitol by an identified militia group on Thursday, March 4."

Why it matters: Washington, D.C. remains on edge following the deadly Capitol insurrection, with lawmakers continuing to conduct investigations into the security failures that led to the Jan. 6 breach.

FBI director: Jan. 6 Capitol attack was domestic terrorism

The FBI views the Jan. 6 Capitol siege as an act of domestic terrorism, director Christopher Wray testified in his opening statement Tuesday before the Senate Judiciary Committee.

Why it matters: The FBI's designation of the attack as domestic terrorism puts the perpetrators "on the same level with ISIS and homegrown violent extremists," Wray said.

Pentagon report: Domestic extremists pose serious threat to military

Pro-Trump supporters storm the U.S. Capitol in tactical gear. Photo: Samuel Corum via Getty Images

Domestic extremists pose a serious threat to the military by attempting to recruit service members into their movement, according to a Pentagon report released Tuesday.

Why it matters: Domestic extremism in the military has become a growing concern in recent years, the report notes. It blew into a bigger issue after the Justice Department charged several former and current military members for their involvement in the Jan. 6 Capitol riots, which the FBI classified as domestic terrorism.