The first witness has taken the stand in the war crimes trial of former Bosnian Serb army chief Ratko Mladic.
Elvedin Pasic held back tears as he described fleeing his village under fire and returning to find elderly neighbours burned in their homes.
He told the International Criminal Court at The Hague how Bosnia's ethnic groups lived in peaceful coexistence until the outbreak of war in the 1990s.
Gen Mladic is charged with 11 counts of war crimes and crimes against humanity.
Mr Pasic is expected to return to the stand after a break to describe how he was held in a makeshift detention centre and survived a massacre that left around 150 people dead in the Bosnian village of Grabovica.
The 70-year-old ex-army chief denies the charges, which date back to the 1992-95 Bosnian War.
He was on the run for 16 years before his arrest and is one of the last key figures wanted for war crimes during the Bosnian War.
The trial was halted in May because of "irregularities" by the prosecution.
Some of the relatives of victims and survivors of the war have expressed concern that if the trial takes too long, Gen Mladic, who has suffered from heart problems, will die before a verdict is reached.