Sex offences linked to Facebook and Twitter have more than quadrupled over the last four years, worrying new figures revealed today.
A total of 1,642 cases where the social networking sites were used to commit a crime or were involved in some way afterwards have been reported to police since 2009.
The number of cases each year soared from 139 to 614 over that period, while the number of alleged rapes has risen from 22 to 117.