Facebook says by the end of September it had removed more than 4.5 million pieces of content related to the Christchurch mosque attacks.
In figures out today, it says 97 percent of the items were removed before any users reported them. Most were detected as soon as they were uploaded.
And it says for the first time it decided to remove attack-related content on a global rather than country-specific basis and the material it removed included non-graphic accounts from news organisations that would not normally be deemed in breach of Facebook's standards.
No one from Facebook was available to be interviewed but New Zealand's engagement director, Andrew Cushen was available to speak to Corin Dann.