The attack during Friday prayers on March 15 was recorded and livestreamed on Facebook, apparently by the attacker, until police contacted the social media company to remove the video. Police alerted us to a video on Facebook shortly after the livestream commenced and we quickly removed both the shooter’s Facebook and Instagram accounts and the video. —@fbnewsroomPhilip Mai, director of business and communications at Ryerson University's Social Media Lab, said it does appear that the original video was taken down faster than in previous incidents like this. The video, 17 minutes long at its full length, was subsequently shared on various social media platforms, including Twitter and YouTube, for hours, despite police appeals not to share the videos and social platforms' reported attempts to stamp out circulating copies. —@RMac18Mai said social media sites are often able to remove content such as music videos that they believe violate someone's copyright far more proactively and automatically, using artificial intelligence.

Source: CBC News March 15, 2019 19:18 UTC