Homeland Security and FBI warn antifa is getting more violent

The Department of Homeland Security is classifying actions by the leftist group known as antifa -- or anti-fascist groups -- as "domestic terrorist violence."

Politico reported Friday that according to previously unreported documents, even before the deadly August 12th rally in Charlottesville, the DHS had issued warnings about the likelihood of lethal violence between the left and right groups.

But it was "anarchist extremists" that were blamed for the violence at a public rally in April 2016. Since then, antifa has become increasingly confrontational and dangerous.

RELATED: Rallies turn violent in Berkeley, Calif.

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Trump rallies turn violent in Berkeley, Calif.
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Trump rallies turn violent in Berkeley, Calif.
Anti and pro-Donald Trump protesters clash during the Patriots Day Free Speech Rally in Berkeley, California, U.S. April 15, 2017. REUTERS/Jim Urquhart
A man is treated after being pepper sprayed during the Patriots Day Free Speech Rally in Berkeley, California, U.S. April 15, 2017. REUTERS/Jim Urquhart
Anti and pro-Donald Trump protesters clash during the Patriots Day Free Speech Rally in Berkeley, California, U.S. April 15, 2017. REUTERS/Jim Urquhart
A protester is peppered sprayed by a counter protester during the Patriots Day Free Speech Rally in Berkeley, California, U.S. April 15, 2017. REUTERS/Jim Urquhart
A pro-Trump supporter bleeds after being hit by a counter protester during the Patriots Day Free Speech Rally in Berkeley, California, U.S. April 15, 2017. REUTERS/Jim Urquhart
Demonstrators in support of U.S. President Donald Trump gestures during a rally in Berkeley, California in Berkeley, California, U.S., April 15, 2017. REUTERS/Stephen Lam
A man in support of U.S. President Donald Trump (L) is being pepper spray by a group on counter-protestor during a rally in Berkeley, California in Berkeley, California, U.S., April 15, 2017. REUTERS/Stephen Lam
A demonstrator in support of U.S. President Donald Trump (L) scuffles with a counter-protester during a "People 4 Trump" rally in Berkeley, California March 4, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY
A man is pulled away from a scuffle as scattered fights break out between supporters of U.S. President Donald Trump and counter-protesters during a "People 4 Trump" rally in Berkeley, California March 4, 2017. REUTERS/Stephen Lam
A bloodied supporter of U.S. President Donald Trump is seen after a "People 4 Trump" rally and counter-protest turned violent in Berkeley, California March 4, 2017. REUTERS/Stephen Lam
A man (L) punches a supporter of U.S. President Donald Trump during a "People 4 Trump" rally in Berkeley, California March 4, 2017. REUTERS/Stephen Lam
Demonstrators against U.S. President Donald Trump throw a traffic cone towards opposition demonstrators during a rally in Berkeley, California in Berkeley, California, U.S., April 15, 2017. REUTERS/Stephen Lam
Counter-demonstrators (L) and supporters (R) of U.S. President Donald Trump fight for a U.S. flag during a "People 4 Trump" rally in Berkeley, California March 4, 2017. REUTERS/Stephen Lam TPX IMAGES OF THE DAY
A Trump supporter wrapped in a Trump flag looks on as multiple fights break out between Trump supporters and anti-Trump protesters in Berkeley, California on April 15, 2017. Hundreds of people with opposing opinions on President Donald Trump threw stones, lit fires, tossed explosives and tear gas and attacked each other with makeshift weapons as police stood by. / AFP PHOTO / Josh Edelson (Photo credit should read JOSH EDELSON/AFP/Getty Images)
A man sprayed with milk after being struck with a chemical irritant as multiple fights break out between Trump supporters and anti-Trump protesters in Berkeley, California on April 15, 2017. Hundreds of people with opposing opinions on President Donald Trump threw stones, lit fires, tossed explosives and tear gas and attacked each other with makeshift weapons as police stood by. / AFP PHOTO / Josh Edelson (Photo credit should read JOSH EDELSON/AFP/Getty Images)
An injured man lies on the pavement as another injured man (R), bloodied from a brawl, walks away after multiple fights broke out between Trump supporters and anti-Trump protesters in Berkeley, California on April 15, 2017. Hundreds of people with opposing opinions on President Donald Trump threw stones, lit fires, tossed explosives and tear gas and attacked each other with makeshift weapons as police stood by. / AFP PHOTO / Josh Edelson (Photo credit should read JOSH EDELSON/AFP/Getty Images)
A woman gets milk poured in her eyes after getting sprayed with a chemical irritant as multiple fights break out between Trump supporters and anti-Trump protesters in Berkeley, California on April 15, 2017. Hundreds of people with opposing opinions on President Donald Trump threw stones, lit fires, tossed explosives and tear gas and attacked each other with makeshift weapons as police stood by. / AFP PHOTO / Josh Edelson (Photo credit should read JOSH EDELSON/AFP/Getty Images)
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The group seems to focus on white-supremacist groups which could lend support to Trump's idea that the left was also partly responsible for the violence in Charlottesville.

Extremists on both sides have used the incident to recruit large numbers of new members to their cause and have threatened more confrontations.

A former New York City Police Officer says "Both the racists and a segment of violent antifa counter-protesters are amped for battle in an escalating arms race..."

The FBI and DHS says that they are monitoring "conduct deemed potentially suspicious and indicative of terrorist activity" by antifa groups.

But despite the warnings, the DHS has acknowledged its gaps in understanding antifa, saying it only has "medium confidence" in its assessments regarding affiliation and motivation.

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