Video that appeared to be one of the shootings was live-streamed, clearly in the hope that it would go viral on social media. An individual announced his intention to carry out an attack on the online messaging board 8chan, linking to the manifesto, before the massacre occurred. Before the massacre, a man posted a long manifesto, police said, which was full of inside references to online memes and ideas that are commonly circulated among the radical right. However, it appears that one person with advance knowledge of the planned attack is an active participant in a radicalized online right-wing media culture. (Tayyab Hameed/Reuters)ĭetails are still emerging about the attack in Christchurch, New Zealand, in which at least 49 people were killed at two mosques. People gather at a vigil for Christchurch shooting victims at Lakemba Mosque in Sydney on Friday.