The murder of the heir to the Austro-Hungarian Empire and his wife produced widespread shock across European royal houses, and there was initially much sympathy for the Austrian position. Ordinary people did not really care about what happened, and on the evening of the assassination the crowds in Vienna listened to music and drank wine, as if nothing had happened. Within two days of the assassination, Austria-Hungary and Germany advised Serbia that it should open an investigation, but Secretary-General to the Serbian Ministry of Foreign Affairs Slavko Gruic, replied: "Nothing had been done so far and the matter did not concern the Serbian Government." An angry exchange followed between the Austrian Chargé d'Affaires at Belgrade and Gruic.