MADRID: Spanish police said on Saturday they  had undertaken a vast operation against child pornography across the  country, arresting 81 men suspected of having exchanged sexual photos  and videos of minors over the Internet. Among those arrested were two  minors and two people considered mentally handicapped, national police  officials said in a statement. The suspects had exchanged the  pornographic photographs and videos of children online and “some of the  images seized by police are extremely harsh and show sadism and  bestiality,” the statement said. Child pornography investigation  began with “cyber-patrols” on Internet by specialised agents, who  after about a year were able to identify dozens of suspects. “Agents  are continuing to analyse the material seized to determine if there  have been crimes of producing child pornography, sexual abuse of minors  or connection with paedophiles,” police said.