Gangs of child sex abusers based in Valencia and Alicante on the south east coast of Spain.these two areas are said to have links with paedophiles in other countries including Belgium, Portuguese newspaper Diario de Noticias reported.
A detective from the agency told the paper: "We cannot discount anything."
The news came on the same day police launched a manhunt for a missing five-year-old girl named Marilux abducted in Parque Moret Huelva,a Spanish town .
Police in Huelva said the local girl, from a gypsy family, vanished at about 10.40pm last night while playing in a park with friends.
Officers are investigating a travelling circus in the area at the time.