SARAJEVO, Bosnia and Herzegovina, Aug. 23 — For a month usually devoid of political activity in Bosnia and Herzegovina, August has been unusually fraught, as several incidents have raised ethnic tensions to a level not seen in years. On Aug. 11, a bomb severely damaged the tomb of Alija Izetbegovic, the former Bosnian president. Last week in eastern Bosnia, a group of Muslims forced their way into a Serbian church built on the former site of a mosque. And the broadcast of a videotape showing the wartime killing of an unarmed Bosnian Serb by Muslims prompted calls for a senior...
