Breitbart News, the outlet once led by US President-elect Donald Trump's chief strategist, has been blocked by one of the largest digital publishing advertisers for violating hate speech standards.
AppNexus deactivated Breitbart News after an audit of the site's content determined that it violated the advertising network's code of conduct banning hate speech, spokesman Joshua Zeitz said.
Breitbart Chief Executive Officer Larry Solov said the company "always and continues to condemn racism and bigotry in any form," in an email statement.
The ban comes as the alt-right movement, which includes neo-Nazis, white supremacists and anti-Semites, are being emboldened by Trump winning the White House.
Trump on Tuesday condemned the alt-right in a New York Times interview.
Breitbart was previously headed by Steve Bannon, Trump's campaign chairman and chief strategist. The news organisation has drawn criticism for promoting far-right, sometimes racist views.
