For four years, 2001–2005, Gotovina remained at large despite intense pressure from the United States and the European Union for his surrender. Foreign countries sought to hunt down Gotovina, and an Interpol warrant was issued for his arrest. The United States announced a $5 million (€4.2 million) reward for his capture. The British Secret Intelligence Service (MI6) was reported in Croatian media in 2004 to have been allowed to import sophisticated monitoring equipment to track down Gotovina. This caused resentment among elements of Croatia's security establishment; as a result, MI6 officers based in Croatia under cover were exposed in the Croatian media, allegedly at the behest of Gotovina's sympathisers in Croatia's counter-intelligence service, the POA ("Protuobavještajna agencija"). Prior to that, a number of Croatian security officials were sacked, including POA head Franjo Turek, who was replaced by Joško Podbevšek and shortly afterwards by Tomislav Karamarko. The wiretapping operation went ahead after Turek's retirement in March 2004, under his successor at the POA, but failed to locate Gotovina before a deadline set by the Croatian prime minister Ivo Sanader in June 2004. According to a leaked memo from MI6 to the POA, the UK government had called for Turek's arrest, unless he started to cooperate on Gotovina.