A bomb hoax delayed the corruption trial of former Croatian Prime Minister Ivo Sanader, local authorities said here on Friday. Police evacuated the Zagreb Country Court building on Friday morning after receiving an anonymous call warning of a bomb in the building. Police searched the building with sniffing dogs and later proved the bomb tip-off is a hoax. Investigation into the anonymous caller is under way. The hearing of Sanader continued later in the day. Sanader, who served as Croatia\'s Prime Minister from 2003 to 2009, surprised the nation with a sudden resignation in July 2009. He was arrested in Austria in December last year and was extradited to Croatia in July following Croatia\'s anti-corruption campaign. The former prime minister has since remained in a prison in Zagreb and is facing corruption charges.