By Caroline Linton CBS News August 10, 2018, 9:39 PM Twitter suspends Proud Boys, Gavin McInnes accounts ahead of Unite the Right rally

Twitter suspended the accounts associated with Proud Boys, a right-wing group present at the 2017 Unite the Right rally in Charlottesville, and its founder, Gavin McInnes. The suspensions came ahead of the Unite the Right 2 rally expected to take place in Washington, D.C. on Sunday.

A Twitter spokesperson confirmed the accounts had been suspended from Twitter and Periscope, and said it was for violating company policy "prohibiting violent extremist groups."

McInnes, who co-founded Vice Media, created Proud Boys in 2016. The group, which has fought being linked with the "alt-right," recently participated in the Aug. 4 right-wing protest in Portland.

Right wing provocateur and Vice co-founder Gavin McInnes (C) pumps his fist during a rally at Martin Luther King Jr. Civic Center Park on April 27, 2017 in Berkeley, California. Protestors gathered in Berkeley to protest the cancellation of a speech by American conservative political commentator Ann Coulter at UC Berkeley.

Elijah Nouvelage / Getty Images

The Southern Poverty Law Center says Proud Boys and their leaders "regularly spout white nationalist memes and maintain affiliations with known extremists."

Unite the Right organizer Jason Kessler is a former member of Proud Boys, according to SPLC. After last year's demonstration in Charlottesville turned deadly, the city denied him a permit to hold a rally on the anniversary. Kessler moved the rally to Lafayette Square in Washington D.C. on Sunday, Aug. 12.

McInnes has diavowed last year's Charlottesville rally.

Twitter's decision to suspend the Proud Boys accounts and McInnes comes in a week where the company has been highly criticized for not banning accounts associated with Alex Jones and InfoWars. Twitter CEO Jack Dorsey tweeted that those accounts would not be banned because they had not violated the company's rules.

Dorsey wrote that Twitter will "continue to promote a healthy conversational environment by ensuring tweets aren't artificially amplified." But he also admitted the company has been "terrible" at explaining why some accounts are banned and others remain.

Jones, meanwhile, tweeted Friday that a "Twitter Crackdown/purge of all conservatives" had begun.

© 2018 CBS Interactive Inc. All Rights Reserved. Protesters Rally In Berkeley After UC Berkeley Cancels Scheduled Ann Coulter Speech