Twin brothers arrested for six rapes in Marseille to have their DNA tested
   in Marseille last year.
   Marseille police chief Emmanual Kiehl said: `It is a highly unusual
   here in Marseille.
   in Marseille, France last year (file picture)
   in Marseille, France last year (file picture)
   Police in Marseille are also holding two 21-year-old Corsican twins