Hundreds of US public officials, police officers and soldiers are or have been involved with the far-right Oath Keepers militia, according to a report from an anti-extremism organisation.
The Anti-Defamation League’s Center on Extremism compared the names from a leak of Oath Keepers membership rolls with public records and social media.
Some alleged members have denied any affiliation with the group.
Oath Keepers are accused of playing a key role in last year’s Capitol riots.
The report raises fresh concerns about the presence of extremist ideology in law enforcement and the military.
“The Oath Keepers are a virulently anti-government, violent extremist group,” Anti-Defamation League (ADL) chief executive Jonathan Greenblatt said in a statement on Wednesday.