Most of the arrests were in Belgium , according to Spanish media . The ring operated by stealing passports in various Spanish cities and sending them to Thailand , where they were altered and sent to the other five European countries to criminal networks , to facilitate fraudulent border crossings . Police seize blank passports , national ID cards , Spanish media report . Police look for a printing machine in UK , one report says . NEW : Police say ring also trafficked in Barcelona , Belgium , UK , Belgium among others .
Most of the arrests were in Belgium , according to Spanish media . Police seize blank passports , national ID cards , Spanish media report . Police look for a printing machine in UK , one report says . NEW : Police say ring also trafficked in Barcelona , Belgium , UK , Belgium among others .