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WASHINGTON (AP) — The FBI is warning of plans for armed protests at all 50 state capitals and in Washington in the days leading up to President-election Joe Biden’s inauguration, stoking fears of more bloodshed after last week’s deadly siege at the U.S. Capitol.

An internal FBI bulletin warned that, as of Sunday, the nationwide protests may start later this week and extend through Biden’s Jan. 20 inauguration, according to two law enforcement officials who read details of the memo to The Associated Press. Investigators believe some of the people are members of some extremist groups, the officials said. The bulletin was first reported by ABC.

“Armed protests are being planned at all 50 state capitols from 16 January through at least 20 January, and at the U.S. Capitol from 17 January through 20 January,” the bulletin said, according to one official. The officials were not authorized to speak publicly and spoke to the AP on condition of anonymity.

Here in Denver, Colorado State Patrol is responsible for security at the state capitol.

“We have been monitoring events on the national level and will continue to monitor for possible events in Colorado. We support all those who plan to peaceably assemble in order to exercise their first amendment rights. Our agency is prepared for this potential activity and emphasizes the importance of a peaceful approach that allows for safe public discourse for all. Due to security reasons, we do not discuss our staffing or our measures in place,” a statement from CSP said.

The FBI issued at least one other bulletin — they go out to law enforcement nationwide on the topic — before the riots last week. On Dec. 29, it warned of the potential for armed demonstrators targeting legislatures, the second official said.

Army Gen. Daniel Hokanson, chief of the National Guard Bureau, told reporters on Monday that the Guard is also looking at any issues across the country,

“We’re keeping a look across the entire country to make sure that we’re monitoring, and that our Guards in every state are in close coordination with their local law enforcement agencies to provide any support requested.”

The riots followed weeks on online calls for violence in Washington in the waning days of Donald Trump’s presidency.

A tweet in which Trump promised that last Wednesday’s event “will be wild” fueled a “month-long frenzy of incitements, strategizing, and embrace of violence against lawmakers,” according to a research group that tracks online extremism activity, In a report issued Saturday, the SITE Intelligence Group also warns that the Capitol attack has emboldened Trump-supporting extremists.

“No matter how all this plays out, its only the beginning,” posted a user on TheDonald message board, according to the report.

As more protests are planned across the country, the FBI urges residents to stay vigilant. If you are at a gathering and notice something suspicious, or if you see something online report it immediately. Call 303-629-7171, or go on-line at https://www.fbi.gov/tips.