Zagreb, July 1 - Italian President Giorgio Napolitano on Monday demaned the United States provide "satisfactory responses" to media reports that it spied on the diplomatic offices of the European Union and several countries, including Italy. "It's a thorny issue that needs to be met by satisfactory responses," Napolitano told reporters during a visit to Zagreb. The head of state added that he did not know if reports Italy's diplomatic offices in Washington and New York had been spied upon were true. "I don't have news of this type," Napolitano said. "You can ask the foreign minister (Emma Bonino) if she has information". EU High Representative for Foreign Affairs Catherine Ashton said on Sunday that U.S. authorities were immediately contacted about the alleged surveillance activities after reports in German magazine Der Spiegel and British daily The Guardian.