Sussex Police have arrested a 43-year-old man in Bexhill as part of a national operation targeting people distributing indecent images of children.
They also seized computer equipment. The man was later released on conditional police bail until December while enquiries continue.
Sussex officers were supported by officers from the Serious Organised Crime Agency (SOCA), are investigating intelligence that indecent images of children have been exchanged via email with people in the United States.
This area of policing is particularly difficult not only due to the nature of the images officers have to view, but also to the devious electronic methods the criminals use to try to conceal their offending across the web.
On average we have at any one time around 60 active cases, 40 suspects on bail or charged, and 20 initial referrals under intelligence progression prior to any arrest. We have viewed and removed from circulation millions of images, all deeply offensive and insulting to children, and many of them of the most sickening type."