(ANSA) - BELGRADE, MAY 28 - Slovenia's anti-graft watchdog has launched an investigation into the possibility that Slovenian Prime Minister Robert Golob violated integrity law when he and his partner vacationed at the Croatian seaside property of a businessman and fellow party member who the government appointed to two hospital councils. Golob is suspected of a conflict of interest, the Slovenian news agency STA reported. (ANSA).