section_path: Police and judicial co-operation
section_name: Police and judicial co-operation
paragraph_text: Police and judicial co-operation
  
  To counter the potentially aggravating effects of the abolition of border controls on undocumented immigration and cross-border crime, the Schengen acquis contains compensatory police and judicial measures. Chief among these is the Schengen Information System (SIS), a database operated by all EU and Schengen states and which by January 2010 contained in excess of 30 million entries and by January 2014 contained in excess of 50 million entries, according to a document published in June 2015 by the Council of the European Union. Around 1 million of the entries relate to persons, 72% of which were not allowed to enter and stay in the Schengen Area. Only 7% of persons listed on the SIS database were missing persons.
  
  The vast majority of data entries on the SIS, around 49 million, concern lost or stolen objects. The European Council reports that in 2013 an average of 43 stolen vehicles a day were detected by authorities using the SIS database.
  
  A list of EU authorities with access to SIS is published annually in the Official Journal of the European Union. As at 24 June 2015, 235 authorities can use the SIS database. The SIS database is operationally managed by eu-LISA.
  
  The Schengen Agreement also allows police officers from one participating state to follow suspects across borders both in hot pursuit and to continue observation operations, and for enhanced mutual assistance in criminal matters.
  
  The Schengen Convention also contained measures intended to streamline extradition between participating countries however these have now been subsumed into the European Arrest Warrant system.