Facebook has banned Holocaust denial posts, more than two years after its founder Mark Zuckerberg suggested they should be allowed in the name of freedom of speech.
The social media platform has updated its policies to ensure any related content is removed.
It follows a crackdown on other forms of hate speech, including a ban on white supremacist and militia groups.
Announcing the change, Mr Zuckerberg said his own thinking on the issue has 'evolved' due to an increase in antisemitic violence.
He said: "We've long taken down posts that praise hate crimes or mass murder, including the Holocaust.
"But with rising anti-Semitism, we're expanding our policy to prohibit any content that denies or distorts the Holocaust as well.
"If people search for the Holocaust on Facebook, we’ll start directing you to authoritative sources to get accurate information.
"Drawing the right lines between what is and isn't acceptable speech isn't straightforward, but with the current state of the world, I believe this is the right balance."
A number of groups had called for Facebook to make the move to ban such content, with US group Anti-Defamation League saying such content had "appeared across the platform, including in both public and private groups specifically devoted to the topic".
