A woman was allegedly chopped into pieces and her remains dumped in different bins by a convicted drug dealer she met online.
Jorge Ignacio Palma, 37, is understood to have made the horrifying confession after giving himself up to detectives investigating the disappearance of Marta Calvo Buron.
Martha, 25, vanished on November 7 after arranging online to meet Palma at his rented home near the east coast Spanish city of Valencia.
Palma was thought to have fled to Italy before it was reported yesterday he had been in hiding.
He had already been linked to a previous police investigation in April after detectives discovered he had been the last client of a prostitute who reportedly died after suffering convulsions moments after he fled the brothel in Valencia.
Police have already searched rubbish bins in his home town and surrounding villages and are now understood to be focusing on waste plants and municipal tips.
Spanish media reports said a waste plant collecting household rubbish from the area where Palma lived had been ordered to suspend operations at midday yesterday to facilitate the search for Marta’s body parts.
After Palma's reported confession, it is not yet clear what he told cops during a subsequent formal interview in the presence of his defence lawyer.
Juan Carlos Fulgencio, a central government spokesman for the Valencia region, said after the suspect’s arrest: “We could be looking not only at a disappearance, but also at a physical aggression that could have resulted in Marta’s violent death.
“Jorge Ignacio has been arrested, he is in Spain and he is going to be questioned about Marta’s violent disappearance.
“The hypothesis that’s always been on the table is that she suffered a violent assault that possibly caused her death.”
Palma, who returned to Spain after being jailed for drugs trafficking following his 2008 arrest, vanished five days after Marta’s disappearance.
He is said to have handed himself into police after being pressured into doing so by his family.
The rented home where he was last seen with Marta, and a car he is suspected of trying to have disposed of at a scrapyard, had already been searched by police.
Detectives knew where the missing woman had been the night she was last seen because she sent a WhatsApp to her mum with her exact location on as a precaution.