Facebook's secret rules on murder, suicide, sex, threats and violence are leaked

The secret rules which Facebook bosses use to decide what its two billion users can post on the site are revealed for the first time.

The Guardian newspaper claims to have seen more than 100 internal training manuals, spreadsheets and flowcharts which give insight into what Facebook deems is or is not acceptable on issues of violence, hate speech, terrorism, pornography, racism and self-harm.