SAO PAULO (AP) — Brazilian police have launched an operation aimed at identifying people who store and share child pornography, issuing almost 100 arrest warrants and taking 45 people into custody, a police official said Wednesday.

The Brazilian federal police officer says the one-year investigation has found evidence that the images were also shared by people in Portugal, Italy, Colombia, Mexico and Venezuela. He spoke on condition of anonymity because he was not authorized to discuss the matter with the press.

The officer said the suspects could be charged with production, storage and distribution of pornographic images of children and teenagers, and face as much as six years in prison.

He said to identify the suspects police tracked the so-called Deep Web, a virtual world that is not visible to most Web users or search engines. That evidence collected will be shared with police authorities in the affected countries.