Police in New Zealand have said they are 'actively investigating' social media users who posted footage of the Christchurch massacre, after two people were charged there for allegedly sharing the Facebook live stream.
Alleged gunman Brenton Tarrant posted the horrific footage of the shootings - including the very moment that worshippers were gunned down - last Friday on his Facebook page last Friday.
The social media giant says it has removed some 1.5million videos of the attack, in which 50 people died, but is facing fresh scrutiny over the content which is distributed on its platform.
Philip Neville Arps (pictured) appeared in Christchurch District Court accused of sharing the footage of the terrorist massacre last Friday
Armed police officers speak to members of the Muslim community near Al Noor mosque in Christchurch today
New Zealand police said in a statement: 'Police are actively investigating the sharing and dissemination of the video.
'For operational reasons, we are unable to go into specific details regarding our investigation.'
Facebook refused to specify if they would identify users who shared the video.
The firm's vice president Chris Sonderby said: 'We have been working directly with the New Zealand Police to respond to the attack and support their investigation.
'We removed the attacker's video within minutes of their outreach to us, and in the aftermath, we have been providing an on-the-ground resource for law enforcement authorities.
'We will continue to support them in every way we can.'
The first user report on the original video came in 29 minutes after the video started, and 12 minutes after the live broadcast ended, Facebook said.
Other shares that are visually similar to that video are detected and automatically removed from Facebook and Instagram, the social network said.
MailOnline has approached Twitter and YouTube to ask if they will share users' identities with law enforcement.
Britain's Crown Prosecution Service said it would look at any files passed to it by police, in line with usual practice.
