Responding to warnings of potentially violent demonstrations, governors across the nation are calling out National Guard troops, declaring states of emergency and closing their capitols to the public ahead of President-elect Joe Biden’s inauguration next week.

Though details remain murky, demonstrations are expected at state capitols beginning Sunday and leading up to Biden’s succession of President Donald Trump on Wednesday. State officials hope to avoid the violence that occurred Jan. 6, when a mob of Trump supporters stormed the U.S. Capitol, leaving a Capitol Police officer and four others dead.

The FBI has warned of the potential for violence at all state capitols and has said it is tracking an “extensive amount of concerning online chatter,” including calls for armed protests.

Governors across the country are sending thousands of National Guard troops to Washington, D.C., where the National Mall has been closed to the public as part of an intense security effort.

More than a dozen governors also have called out the Guard to protect their own state capitols and aid local law enforcement officers.

On Thursday, federal prosecutors said there was “strong evidence” the pro-Trump mob that stormed the U.S. Capitol aimed to “capture and assassinate elected officials,” but the head of the investigation cautioned Friday that the probe is still in its early stages and there was no “direct evidence” of such intentions.

The accusation came in a motion prosecutors filed late Thursday in Phoenix in the case against Jacob Chansley, the Arizona man who took part in the insurrection while sporting face paint, no shirt and a furry hat with horns.

“Strong evidence, including Chansley’s own words and actions at the Capitol, supports that the intent of the Capitol rioters was to capture and assassinate elected officials in the United States Government,” prosecutors wrote in their memo urging the judge to keep Chansley behind bars.

But Michael Sherwin, acting U.S. attorney for the District of Columbia, backed away from those claims later Friday, saying they have “no direct evidence at this point of kill, capture teams.”

Sherwin said there appears to have been confusion among some prosecutors in part because of the complexity of the investigation and number of people involved.

The sprawling investigation involves multiple cities and jurisdictions, in part because so many of the rioters simply went home; only 13 were arrested in the moments after the building was cleared.

The FBI has been investigating whether any of the rioters had plotted to kidnap members of Congress and hold them hostage, focusing particularly on the men seen carrying plastic zip-tie handcuffs and pepper spray.

More than 80 people are facing charges stemming from the violence, including more than 40 people in federal court. Dozens more were arrested for violating a curfew that night. The federal charges brought so far are primarily for crimes such as illegal entry, but prosecutors have said they are weighing more serious charges against at least some of the rioters. Some were highly-trained ex-military and police.

“We are prepared for the worst, but we remain hopeful that those who choose to demonstrate at our Capitol do so peacefully, without violence or destruction of property,” Michigan State Police Col. Joe Gasper said Friday.

Some windows also were boarded at capitols in Wisconsin and Illinois, both of which activated the National Guard to help with security. Though the Wisconsin Capitol already was closed to the public because of the coronavirus, Democratic Gov. Tony Evers’ administration told those who had been coming into the Capitol to instead work remotely for the rest of the month.

California Gov. Gavin Newsom is mobilizing up to 1,000 National Guard members over concerns of civil unrest. State officials on Thursday erected a chain link fence around the Capitol, bolstering other temporary and permanent barriers. The California Highway Patrol is refusing to issue permits for rallies at the Capitol.

Uncertainty heading into the weekend was a common theme among state officials and law enforcement officers. Many were enhancing security based on past demonstrations or general warnings but without specific expectations about how many protesters, if any, would show up in the coming days.

The National Guard is supplementing security at Washington’s capitol, where people broke a gate and entered the grounds of the governor’s mansion last week. But Washington State Patrol spokesman Chris Loftis said Friday that there are “no known explicit threats” detailing the time, place and action of future demonstrations.

Legislatures in several states, including Michigan, also were canceling or limiting their work next week.Oregon’s Legislature will convene Tuesday. But the House and Senate have canceled floor sessions and committee hearings, and there will be no in-person meetings. The Republican-led South Carolina House and Senate won’t convene in full session Tuesday or Wednesday, and committees will meet virtually.