Multiple reports describe a case involving teenagers in London in which a fatal stabbing is alleged to have been captured and shared via Snapchat. The articles say a 15-year-old boy watched footage on a phone screen showing his friend dying after being stabbed multiple times during a planned “linkup” in Hackney, east London. They frame the incident as an example of how violent content can be circulated quickly through social media platforms, including in ways that expose viewers to graphic material. The accounts emphasize the age of those involved and the role of smartphone viewing and sharing. The reports do not provide detailed verified information about the full chain of events, the identities of those involved, or the outcome of any investigation in the text provided. However, the common thread across the sources is the claim that the fatal attack occurred in Hackney and that Snapchat was used to view or circulate the resulting video. The articles present the incident as highlighting safety concerns for teenagers using social media.