MENLO PARK (CBS SF / CNN) — Facebook on Thursday said it had take action against ads run by President Trump’s re-election campaign for breaching its policies on hate. The ads, which attacked what the Trump campaign described as “Dangerous MOBS of far-left groups,” featured an upside-down triangle.

The Anti-Defamation League said Thursday the triangle “is practically identical to that used by the Nazi regime to classify political prisoners in concentration camps.”

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“We removed these posts and ads for violating our policy against organized hate. Our policy prohibits using a banned hate group’s symbol to identify political prisoners without the context that condemns or discusses the symbol,” Andy Stone, a Facebook spokesperson, told CNN Business.

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The ads targeted the far left group Antifa, calling on Trump supporters to back the President’s calls to designate the group a terrorist organization.

Responding to criticism of the ad earlier Thursday, the Trump campaign claimed the red triangle was “a symbol widely used by Antifa.”

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