Thirty-one members of the national white supremacist group Patriot Front were arrested Saturday in Coeur d’Alene, Idaho, and charged with conspiracy to riot, a misdemeanor, according to police.

In a press conference Saturday, Coeur D’Alene Police Chief Lee White said a concerned citizen reported “a little army” of about 20 people wearing masks and holding shields loading into a U-Haul truck. Police pulled over the truck about 10 minutes later, White said.

Police had received reports that groups planned to disrupt LGBTQ Pride activities planned for the weekend, White said, leading to a heavy police presence in downtown Coeur d’Alene, about 30 miles east of Spokane, Washington.

Experts on extremism immediately identified the arrestees as members of Patriot Front, which often engages in propaganda efforts like putting up posters and making videos, and that has also participated in recent “flash mob” events, where identically dressed members march around shouting slogans and waving flags.   

Here’s what we know:

Who was arrested in Idaho?

Within hours of the arrests, the Kootenai County Sheriff’s Department released booking photos and names for 31 men. The arrestees were from around the country, including Texas, Wyoming, South Dakota, Washington, Colorado, Arkansas and several other states. Most of the arrestees appeared to be white men in their 20s and 30s.

Each man was  charged with one count of conspiracy to riot, White said, but he stressed more charges could be forthcoming.

“They came to riot downtown,” White told reporters at the news conference.

The founder of Patriot Front, 23-year-old Thomas Rousseau of Texas, was among the 31 who were arrested.

All of the arrestees bonded out of jail and were scheduled to be arraigned in the coming weeks, Kootenai County First District Trial Court Administrator Karlene Behringer told USA TODAY.

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What is Patriot Front?

Patriot Front is a secretive white supremacist organization primarily known for creating slick propaganda videos showing members putting up flyers and hanging banners around the country.  

Oren Segal, vice president of the Anti-Defamation League’s Center on Extremism, said the group is most known for spreading white supremacist propaganda. According to ADL data, Patriot Front is responsible for approximately 80% of such propaganda across the U.S.