A man was arrested for he allegedly stabbing an anonymous protected witness in the trial of former Bosnian Serb fighter Dragan Sekaric, who is accused of a series of wartime atrocities.

The unveiling of portraits of Gavrilo Princip and Archduke Franz Ferdinand on the exterior of the Sarajevo Museum mark the start of a series of events commemorating the centenary of the outbreak of World War One.

Serbian experts will examine the site of another suspected mass grave near the town of Raska, where the bodies of 37 Kosovo Albanians killed during wartime have already been found.