MPs debate far-right violence and online extremismpublished at 16:48 Greenwich Mean Time 18 March 2019
Labour MP Janet Daby is now asking her urgent question on far-right violence and online extremism following the attack on two mosques in New Zealand last week.
Social media companies have faced criticism after footage of the attack, which left 50 people dead, was live-streamed by the attacker.
Despite the original video being taken down, it was quickly replicated and shared widely on other platforms, including YouTube and Twitter.
Home Secretary Sajid Javid has warned social media firms to "clean up their platforms" or be prepared to face the "force of the law".
Facebook says it has deleted more than 1.5m copies of the video of the attacks and 1.2m copies were blocked while they were being uploaded.
YouTube has said it is "working vigilantly" to remove any violent footage.