Police raid suspected grooming house
8 May 2012 Last updated at 16:00 BST
Nine men have been convicted of being part of a child sexual exploitation ring in Greater Manchester.
The men, who are all from Rochdale and Oldham, 'groomed' young girls, one as young as 13.
Greater Manchester Police's Public Protection Unit specialises investigating allegations of grooming.
GMP has admitted failings in the way it handled another case of child sexual exploitation, but insists it has learned lessons.
The BBC's UK Affairs Correspondent Chris Buckler was with the police during a raid of a property which is at the centre of a separate grooming investigation.