A 19-year-old man in Britain had sex with four girls whom he met on social networking website Facebook and prepared a hit-list of 1,000 potential victims, a court heard.
Ryan Chambers opened 11 accounts on the Facebook and would use four phones. He groomed girls aged 12 to 15 after commenting on their web photos, The Sun reported.
He was first held after a mother of 14-year-old girl reported him. While on bail, a missing girl, 14, was found at his flat in Milton Keynes, Buckinghamshire.
A phone footage of Chambers having sex with two victims was also found. Police later wrote to over 800 parents to find out which targets he had met.
He has been convicted at Aylesbury Crown Court, Buckinghamshire, of eight counts of underage sex and jailed for three years and nine months.