Federal agencies warned of the growing likelihood of lethal violence between left-wing anarchists and right-wing white supremacists.

Some even classified their activities as “domestic terrorist violence.”

In previously unreported documents dating back to April 2016 and viewed by Fox News, the FBI and Department of Homeland Security wrote that “anarchist extremists” and Antifa groups were the primary instigators of violence at public rallies. They blamed these groups for attacks on police, government and political institutions, racists, fascists and “symbols of capitalism.”

The agencies warned the rise of fascist, nationalist, racist or anti-immigrant groups in U.S. political discourse could lead to violent backlash from these “anarchist extremists.”

The FBI and DHS had no comment on the assessments, saying they were not intended to be made public.

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