Boy, 13, arrested in Sheffield over social media posts encouraging school violence Summary A 13-year-old boy has been arrested in Sheffield following social media posts encouraging schoolchildren to engage in violent behaviour. Other Related Coverage How the 'red v blue school wars' exposed the social media gap between children and parents | BBC My son doesn't feel safe going to school after mass brawl | BBC Boy, 13, held over school violence social posts | BBC Boy, 13, arrested over viral ‘school wars’ as ‘reckless’ London trend spreads across UK | The Standard Boy, 13, arrested over viral 'school wars' craze as parents warned over 'reckless and irresponsible' social media trend | The Sun