Fernando del Valle, 57, a Chilean citizen, who is said to have set up a network of property and front companies whose traces disappear into offshore accounts in the nearby British territory of Gibraltar, press reports said.

Some of the welter of documents seized by police since the weekend are understood to implicate an array of companies who have their fiscal base in Gibraltar. The tiny territory has just 30,000 residents but 80,000 companies.

Police said they suspect his law firm of having connections with various groups allegedly involved in narcotics, prostitution and other organized criminal activities.