Facebook said it deleted 1.5 million copies of the New Zealand mosque terror attack video from its platform in the first 24 hours after the massacre.

The social networking giant said in a tweet Saturday night that the majority of the videos were blocked before then made it to the web.

"In the first 24 hours we removed 1.5 million videos of the attack globally, of which over 1.2 million were blocked at upload...," Facebook said in the tweet.

Facebook said it's also removing all edited versions of the video that don't show graphic content.

This is being done, a New Zealand Facebook spokeswoman said, "out of respect for the people affected by this tragedy and the concerns of local authorities."

On Friday, a gunman in Christchurch attacked Muslims praying at a mosque and livestreamed the shooting on Facebook.

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