The FBI privately warned law enforcement agencies Monday that far-right extremists have discussed posing as National Guard members in Washington and others have reviewed maps of vulnerable spots in the city — signs of potential efforts to disrupt Wednesday’s inauguration, according to an intelligence report obtained by The Washington Post.

The document, a summary of threats that the FBI identified in a Monday intelligence briefing, warned that both “lone wolves” and adherents of the QAnon extremist ideology, some of whom joined in the violent siege on the Capitol on Jan. 6, have indicated they plan to come to Washington for President-elect Joe Biden’s swearing-in ceremony.

The FBI also said it had observed people downloading and sharing maps of sensitive locations in Washington and discussing how those facilities could be used to interfere in security during the inauguration.