Anti-Serb rioting broke out in Sarajevo and various other places within Austria-Hungary in the hours following the assassination until order was restored by the military. On the night of the assassination, country-wide anti-Serb pogroms and demonstrations were also organized in other parts of the Austro-Hungarian Empire, particularly on the territory of modern-day Bosnia and Herzegovina and Croatia. They were organized and stimulated by Oskar Potiorek, the Austro-Hungarian governor of Bosnia and Herzegovina. The first anti-Serb demonstrations, led by the followers of Josip Frank, were organized in the early evening of 28 June in Zagreb. The following day, anti-Serb demonstrations in Sarajevo became more violent and could be characterized as a pogrom. The police and local authorities in the city did nothing to prevent anti-Serb violence. Writer Ivo Andrić referred to the violence in Sarajevo as the "Sarajevo frenzy of hate." Two Serbs were killed on the first day of pogrom in Sarajevo, many were attacked, while around 1,000 houses, shops, schools and institutions (such as banks, hotels, printing houses) owned by Serbs were razed or pillaged.