In particular, the new rules ban violent threats or even "wishing for serious physical harm".
The account of far-right group Britain First, a small group that regularly posts inflammatory videos purporting to show Muslims engaged in acts of violence, was among the first to go dark.
Monitors at the San Francisco company will weigh hateful imagery in the same way they do graphic violence and adult content.
UPDATE 2:07pm ET: Liz Kelley, a Twitter spokeswoman, e-mailed Ars: "We do not have additional details to share regarding specific accounts".
The guidelines, announced a month ago and put into force this week, address hateful images or symbols, including those attached to user profiles.
Twitter is also prohibiting users from abusing or threatening others through their profiles or usernames.
Twitter also said it would suspend "accounts that affiliate with organizations that use or promote violence against civilians to further their causes".
Huddersfield's Kachunga out for up to three months
There was better news for Town regarding defender Chris Lowe , who was also forced off before half-time at Vicarage Road .
The account for American Renaissance, a white nationalist online magazine run by Jared Taylor, was among those suspended.
But Twitter said it would not cut off accounts for military or government entities, and would consider exceptions "for groups that are now engaging in (or have engaged in) peaceful resolution".
Brad Griffin, who blogs under the name Hunter Wallace on the website Occidental Dissent, said in blog post that he was also suspended, along with Michael Hill, president of the League of the South, the Traditionalist Workers Party and others.
There appeared to be some inconsistencies. Still on Twitter was David Duke, with some of his posts hidden behind the "sensitive material" warning.
While the new guidelines are now in play, the social media company continues to work out internal monitoring tools and it is revamping its appeals process for banned or suspended accounts.
The new rules are because some users with ties to the alt-right or neo-Nazi movements have taken advantage of Twitter to send false news reports and to attack their critics.
The platform has long faced criticism over how it deals with hate groups and content, which led it to removing verification badges from prominent USA white nationalists last month.
Some alt-right associated Twitter users feared that the new rules would mean a "purge", with some moving to Gab, a social media site that is alt-right friendly, the Recode report said.
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