Nine people were arrested in Derbyshire during a major national operation over child abuse.
The suspects were among 660 questioned nationwide, including workers who had access to children through their jobs and had no previous contact with police.
They were held as part of a six-month operation called Operation Notarise which targeted internet users who accessed child abuse images and had already led to charges for serious sexual assault.
Detective Chief Inspector Gareth Meadows, who leads the Derbyshire Police child sexual exploitation unit, said: “Since it launched, we have been fully engaged with Operation Notarise, which has been led by the National Crime Agency.
“We recognise that for every image that is sold, shared or distributed on the internet, a child somewhere in the world has been subjected to abuse. We tackle this daily.”
Derbyshire police said it arrested nine people on suspicion of accessing indecent images of children during the six-month national operation.
Detectives added they had prosecuted 68 people for indecent images offences during its own on-going crackdown on web-based child abuse in the county, which was launched in early 2013. There are more than 40 investigations still on-going.