Brussels, 28/03/2007 (Agence Europe) - EU leaders warned on Tuesday of a rise in illegal immigration at the Union's external borders, particularly the southern borders. “We cannot, unfortunately, expect the migratory pressures on the EU's southern maritime borders to diminish in the near future,” said Immigration Commissioner Franco Frattini, at the opening of the new headquarters of the European borders agency, FRONTEX. “The demographic statistical data indicate that migration is set...