(ANSA) - BELGRADE, MAR 18 - A few days before Slovenia's March 22 election, outgoing Prime Minister Robert Golob announced an investigation into electoral interference by Israeli private intelligence firm Black Cube. According to Euractiv, the new investigation has been linked to Janez Janša, the conservative leader of the Slovenian Democratic Party (SDS), who will challenge outgoing Prime Minister Golob in the upcoming elections. The news site claims Janša and Black Cube engaged in a "smear campaign" against Golob's Freedom Movement party. (ANSA).