Columns of smoke rise above the Drina river valley, the graveyard in Zvornik has overflowed and Bosnian Muslims are on the offensive. Black-clad families march to Zvornik's cemetery to bury their sons. Fighters speed past in lorries mounter with anti-aircraft guns. They call themselves the Legion of Death. The tump of artillery can be heard around Zvornik.
Bosnian fighters are less than ten miles away.
Ten miles to the south, smoke rises above Drinjaca. Last Thursday Dr Vracevic stood on the Serbian bank of the Drina and watched the Bosnian Serb village of Novo Selo burn. On the same day, Podravanje, close to Bratunac, also fell. Yugoslav police say that Muslim guerillas are so close to the Drina, which separates Bosnia from Serbia, that the occasional mortar sometimes lands over on their side. Operating out of unconquered enclaves, and using weapons smuggled along partisan trails, Bosnian forces have put Serbs on the defensive in areas previously well under their control.