Australian Prime Minister Scott Morrison has called for global restrictions on social media following the Christchurch Mosque attacks in which 50 people were killed.
Facebook and other firms have been criticized for failing to block a live-stream of the attack.
In a letter to Japan’s Prime Minister Shinzo Abe, who chairs the G20, Mr Morrison asked for leaders to discuss the issue at the upcoming G20 meeting.
Mr Morrison said the aim was to “agree on co-ordinated action to afford greater protection from terrorist violence”.
UK home Secretary Sajid Javid also called on social media firms to take action to stop extremism on their channels.
The gunman filmed the attack and the live-stream on Facebook lasted for 17 minutes.
Despite the original video being taken down, it was quickly replicated and shared widely on other platforms, including Youtube and Twitter.
In a statement on Monday, Facebook says the video was viewed fewer than 200 times during the live broadcast, and about 4,000 times in total before it was removed.
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