M. Yov. M. Yovanovitch, the Serbian Minister at Vienna, wrote three letters to Nikola Pašić, the Prime Minister of Serbia and Minister for Foreign Affairs from Vienna on 15th July 1914.
The most important question for us is, what, if any, are the intentions of the Austro-Hungarian Government as regards the Serajevo outrage. Until now I have been unable to find this out, and my other colleagues are in a similar position. The word has now been passed round here not to tell anybody anything.
On Monday 13th July 1914, a legal adviser attached to the Austro-Hungarian foreign ministry, Friedrich von Wiesner, reported to Count Von Berchtold his findings on the Sarajevo assassination. Von Wiesner had been assigned to examine the evidence compiled by the civil and military authorities in Sarajevo with a view to discovering the Serbian government’s complicity. He travelled to Sarajevo on 10th July, and spent three days examining the evidence.