"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 tweeted on Saturday.
The company said it is also removing all edited versions of the video that do not show graphic content out of respect for the people affected by the mosque shooting and the concerns of local authorities, Reuters reported.
The death toll in the New Zealand mosque shootings rose to 50 on Sunday. The gunman who attacked two mosques on Friday live-streamed the attacks on Facebook for 17 minutes using an app designed for extreme sports enthusiasts, with copies still being shared on social media hours later.
New Zealand Prime Minister Jacinda Ardern has said she wants to discuss live streaming with Facebook.
Mass shootings at two mosques left forty nine people dead and at least 20 suffered serious injuries in "terrorist" shootings targeting two mosques during Friday prayers in the city of Christchurch.
The shooter, was a 28-year-old Australian man who livestreamed the attack on Facebook.