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.

At least three people are reported dead following an explosion at the Kosovo A power station just outside Pristina on Friday.