An Australian gunman whose assaults on two New Zealand mosques on Friday left at least 49 people dead, published a racist manifesto on Twitter before livestreaming his rampage.
The New Zealand government said it could be illegal to share the video, which showed the gunman repeatedly shooting at worshippers from close range.
The Facebook Live video, taken with a camera that appeared to be mounted on the gunman's body, shows a clean-shaven, Caucasian man with short hair driving to the Masjid al Noor mosque in central Christchurch.
He enters the building and fires repeatedly at worshippers as he moves from room to room.
The 'manifesto' detailing motivations for the attack was posted on Friday morning onto a Twitter account with the same name and profile image as the Facebook page that streamed the attack.
In the video, the shooter parks his car next to the mosque and gets out of the vehicle with a rifle.
He slowly goes to the boot of his car and retrieves another firearm.
He then walks into the compound of the mosque and fires at a person standing near the doorway before dropping the rifle and shooting repeatedly with the second weapon as he moves inside.
The gunman fires dozens of bullets at people trying to run away or lying down in huddled groups in corners of the rooms.
(with news agency inputs)