is a command of the National Crime Agency and allows people to report online sexual abuse or the way someone else has been communicating online.
Others are investigated by CEOP
, who are part of the National Crime Agency.
When North Wales Police went to advise CEOP
of the results of their inquiries, the force further examined materials supplied and discovered there were three people named on additional material against whom no action had been taken.
The NCA made a referral to the IPCC in September last year after it emerged Ceop
had failed to contact police forces concerning the intelligence - provided by Toronto police - for over a year.
"Independent IPCC investigators will be examining closely the actions taken by Ceop
and NCA officers and staff over a 16-month period to determine if they acted appropriately and promptly as well as looking at any possible organisational failings."
His warning came days after the boss of the National Crime Agency, which merged with CEOP
last year, admitted it was powerless to catch most of the tens of thousands in the UK who view child abuse images each year.
However the more recent CEOP
report, titled Threat Assessment of Child Sexual Exploitation and Abuse (TACSEA), highlighted the use of the "hidden internet" and the live streaming of abuse by offenders who target teenagers and young people on their basis of their vulnerability and those who have a sexual interest in children.
In the past two years across 12 investigations, 424 children worldwide have been BLACKmailed in this way, of whom 184 were from the UK, Ceop
Over the past two years, CEOP
found that 424 children have fallen victim to online sexual blackmail, with 184 of these from the UK.
Suspected cases of online grooming can be reported to CEOP
using the ClickCeop reporting button available at www.ceop.police.uk and on hundreds of other websites.
Rosie Atwal, CEOP
's Senior Child Protection Officer and a social worker with 20 years' experience, says: "You can be in a child's bedroom via their mobile phone or laptop using instant messaging or Facebook or other sites.