The FBI official confirmed that they had inputs about the threat of violence.
News reports suggested that the FBI knew beforehand about the violence based on an internal report produced on Jan. 5 by the F.B.I.’s Norfolk office, sent to the bureau’s Washington field office. The FBI officials in Virginia wrote a stark warning about raising alarms of threat violence the day before a mob attacked the Capitol. The document noted the dangerous plans that were put forth by some individuals and calls for violence.
Steven D'Antuono, head of the FBI's Washington Field Office, had said before that there was no information on planned violence at Capitol hill. But on January 12 press briefing, he said they had intelligence about possible violence, and the information had been quickly shared with other law enforcement agencies. They arrested a person named Enrique Tarrio and stopped some people from traveling who had plans to attend the rally to cause violence. However, he defended by saying that the FBI did not know who made the comments and hence could not do much for law enforcement with the information.