The "Justice for J6" rally was billed as a protest for defendants being detained in connection with the January insurrection at the Capitol.
At least 610 individuals have been federally charged for their involvement in the Jan. 6 riot at the United States Capitol, according to the Department of Justice. Most of the roughly 60 who remain behind bars are suspects prosecutors and judges have identified as posing a credible and ongoing threat to the public's safety.
Many of the same far-right groups and individuals who promoted the original Jan. 6 rally-turned insurrection this time warned supporters to avoid the demonstration at all costs. Former President Donald Trump called it a "setup" but also released a statement supporting those charged.
With the House and Senate both out, no lawmakers were at the Capitol on Saturday. But preventative security measures were taken, including the reinstallation of temporary fencing around the Capitol complex.
Here is how the news is developing today. All times Eastern. Check back for updates.
Sep 18, 2021, 1:34 PM EDT
Man with knife arrested, Capitol Police say
Right before the rally kicked off, Capitol Police say they arrested a man with a knife for a weapons violation.
The arrest happened at 12:40 p.m., authorities said. No other details were immediately provided.
Knives are one of over a dozen prohibited items and activities on Capitol Grounds, along with firearms, mace, ammunition and other items.
In the days leading up to the rally, DC Police posted signage in the area of the rally that stated: "All firearms prohibited within 1000 feet of this sign."
Sep 18, 2021, 1:11 PM EDT
Rally organizer lays out 'ground rules'
Rally organizer Matt Braynard laid out "some ground rules" at the start of the protest, urging the crowd to be respectful of law enforcement.
"There are uniformed officers here who I demand that you respect, you are kind to, you're respectful to and you're obedient to," he said. "They're here to keep us safe."
U.S. Capitol police patrol the area on bicycles before a rally near the U.S. Capitol in Washington, Sept. 18, 2021.
Jose Luis Magana/AP
He condemned the violence of the insurrection while calling for transparency in the investigation of the Jan. 6 riot.
"Anybody who engaged in that kind of violence or property destruction that day deserves to be tried with a speedy trial," he said.
Matt Braynard, the organizer behind the rally and a former Trump campaign staffer, speaks during the rally near the U.S. Capitol in Washington, Sept. 18, 2021.
Alex Brandon/AP
"This is about the many people who were there that day who have not been charged with violence, not been accused of assaulting a police officer or destroying property and the disparate treatment they received," he continued.
At least 610 people have been federally charged in connection with the insurrection. About 60 remain behind bars, most of whom are suspects prosecutors and judges have identified as posing a credible threat to public safety based on either their alleged violent assaults against police or role in planning the riot.
-ABC News' Alexander Mallin
Sep 18, 2021, 11:45 AM EDT
Counterprotesters arrive ahead of rally
Counterprotesters could be seen gathering near the Capitol ahead of Saturday's rally, toting signs and flags.
Counter-protester Tim Smith sets up a sign he said refers to former U.S. President Donald Trump near the Capitol, on the day that supporters of defendants being prosecuted in the Jan. 6 attack on the Capitol will hold a rally, in Washington, Sept. 18, 2021.
Jim Bourg/Reuters
One man had a hand-painted sign with the word "Loser" on it, which he told the Associated Press referred to former President Donald Trump.
A Capitol police officer speaks with a counter-protester near the Capitol on the day that supporters of defendants being prosecuted in the Jan. 6 attack on the Capitol will hold a rally in Washington, Sept. 18, 2021.
Jim Bourg/Reuters
A woman could also be seen carrying Black Lives Matter flags.
It is unclear how many protesters and counterprotesters will show up for the event, though organizers have secured a permit for 700 attendees.
Sep 18, 2021, 10:54 AM EDT
US Capitol Police swear in law enforcement partners ahead of rally
Hours before the rally is set to take place, U.S. Capitol Police swore in local, state and federal law enforcement partners Saturday morning, giving the officers jurisdiction in the areas surrounding the Capitol.
Capitol Police said Friday they are working with over 27 agencies from around the region to secure the event.
Police stage at a security fence ahead of a rally near the U.S. Capitol in Washington, Sept. 18, 2021.
Nathan Howard/AP
Officers from Fairfax County, Virginia, to Montgomery County, Maryland, are supposed to be on hand to help Capitol Police.
