The raid saw police impounding between 2.5 million and 3 million images, stored on 290 CDs and DVDs and on two hard-disks. Each disk can contain between 4,000 and 6,000 pictures. The haul is believed to be the largest ever confiscated in Sweden,
Police are not revealing details of the case, although a spokesman told local paper Eskilstuna-Kuriren that all the photos had been confiscated from the same man, who lives in the county.
The images are being examined by a single police officer, Christer Carlsson. Carlsson is Sörmland’s only child pornography expert, although a further police officer is being trained to assist him.
The news comes as Ecpat, an international organization that campaigns against child sex exploitation, has said that Swedish police are doing too little to combat child pornography.
The issue is a low priority, Ecpat says, with only five people in the national police’s centralized anti-child porn group. Helena Karlén, secretary general of Ecpat Sweden, said that the slow investigation of child pornography risks leading to continued abuse of the children on the photographs.