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'Justice for J6' updates: Sparse crowd met with massive police presence at rally

About 400 to 450 people were in the protest area Saturday, Capitol Police said.

Last Updated: September 19, 2021, 7:45 PM EDT

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.

Latest developments:

Here is how the news is developing today. All times Eastern. Check back for updates.
Sep 18, 2021, 10:12 AM EDT

Capitol Police prepared in case of violence but hopeful for peaceful event

U.S. Capitol Police are prepared for potential violence at the "Justice for J6" rally, though are hopeful Saturday's event "remains peaceful," U.S. Capitol Police Chief J. Tom Manger said.

"There have been some threats of violence associated" with the rally, Manger told reporters at a press briefing Friday. "We have a strong plan in place to ensure that it remains peaceful and that if violence does occur, that we can stop it as quickly as possible."

Capitol Police leadership has been working over the last eight months "to ensure that we don't have a repeat of January 6," Manger added.

PHOTO: Security fencing is seen around the Capitol in Washington, Sept. 17, 2021.
Security fencing is seen around the Capitol in Washington, Sept. 17, 2021, ahead of a weekend rally planned by allies of former President Donald Trump that is aimed at supporting the so-called "political prisoners" of the Jan. 6 insurrection at the U.S. Capitol.
Brynn Anderson/AP

Manger told ABC News’ Congressional Correspondent Rachel Scott he is most concerned about violent conflicts between protesters and counterprotesters.

Fencing started going up around the Capitol complex earlier this week as part of an "enhanced security posture" to shield the Capitol from any violence, authorities said.

-ABC News' Luke Barr