The FBI warned Monday that armed far-right extremist groups are planning to march on state capitals this weekend, triggering a rush to fortify government buildings amid concerns that the violence that erupted at the U.S. Capitol last week could spread throughout the country.

The memo is something of a raw intelligence product, compiling information gathered by the bureau and several other government agencies, an official said. Some of it is unverified, and the threat is likely to differ significantly from place to place, though the memo said there were plans in all 50 state capitals, said the official, who spoke on the condition of anonymity because the bulletin is considered a law enforcement document not authorized for wide public release.

But the data points it highlights for law enforcement are nonetheless troubling — including that there was information suggesting people might storm government offices, or stage an uprising were President Trump to be removed from office, the official said…

“These are not the actions of people who believe in this country. These are people who believe they can bully and intimidate other individuals,” Beshear, visibly angry, said. “To anybody who believes that domestic terror is the way to go, we will be ready for you. We will not back down.”