Child in doorway (Gallo Images)

Police spokesman Lt-Gen Solomon Makgale said they were arrested last Thursday. Two were teachers from Florida and Carletonville, a school principal from Nelspruit, a lawyer from Lichtenburg, a Pretoria dermatologist and a North West businessman.

Another 26 people were being investigated and more arrests were imminent, police told the publication.

Police also raided several homes at the weekend in KwaZulu-Natal, Eastern Cape, Western Cape, and Free State.

"Police raided 15 properties and seized 672 DVDs, 22 memory sticks, eight laptops, two computer tablets, 39 external hard drives, 25 books," said Makgale.

The case had links to Canada, the United Kingdom, the United States, western Europe, and Australasia.

The newspaper reported that children as young as five were believed to have been groomed to have sex with each other and adults.

The images are believed to have been generated overseas, and police --with the help of their international counterparts -- are investigating whether children from South Africa participated.

Police overseas were also investigating if any of the children were murdered.

The six accused face several charges including child-pornography manufacturing, possession and distribution.