In early 2012, Tusk announced his support for committing Poland to signing the international Anti-Counterfeiting Trade Agreement (ACTA). In response, websites for the Chancellery, Sejm and Presidency were hacked in mid-January. Following Anonymous's claim of responsibility for the web attack, Tusk remained undeterred by internet protests, authorising the Polish ambassador in Japan to sign the agreement, yet promised that final legislation in the Sejm would not go ahead without assurances regarding freedom to access the Internet. Despite the government's guarantees, mass protests erupted in late January, with demonstrations held in Warsaw, Kraków, Wrocław and Kielce. Further web attacks were reported on the website of Foreign Minister Radek Sikorski.