People pray near coffins at a graveyard during a mass funeral in Potocari near Srebrenica, Bosnia and Herzegovina July 11, 2020. Bosnia marks the 25th anniversary of the massacre of more than 8,000 Bosnian Muslim men and boys, with many relatives unable to attend due to the coronavirus disease (COVID-19) outbreak. REUTERS/Dado Ruvic

Men carry a coffin at a graveyard during a mass funeral in Potocari near Srebrenica, Bosnia and Herzegovina July 11, 2020. Grieving families stood by green-draped coffins of nine newly identified victims who will be buried at a flower-shaped cemetery near the town, where tall white tombstones mark the graves of 6,643 other victims. REUTERS/Dado Ruvic

A woman prays at a graveyard, ahead of a mass funeral in Potocari near Srebrenica, Bosnia and Herzegovina July 11, 2020. About 1,000 victims of the massacre in the eastern town during Bosnia's 1992-1995 war are still missing. REUTERS/Dado Ruvic

Women cry next to a coffin of their family member during a mass funeral in Potocari near Srebrenica, Bosnia and Herzegovina July 11, 2020. Bosnia marks the 25th anniversary of the massacre of more than 8,000 Bosnian Muslim men and boys, with many relatives unable to attend due to the coronavirus disease (COVID-19) outbreak. REUTERS/Dado Ruvic

A woman prays at a graveyard, ahead of a mass funeral in Potocari near Srebrenica, Bosnia and Herzegovina July 11, 2020. Bosnia marks the 25th anniversary of the massacre of more than 8,000 Bosnian Muslim men and boys, with many relatives unable to attend due to the coronavirus disease (COVID-19) outbreak. REUTERS/Dado Ruvic

A woman is seen at a graveyard, ahead of a mass funeral in Potocari near Srebrenica, Bosnia and Herzegovina July 11, 2020. Bosnia marks the 25th anniversary of the massacre of more than 8,000 Bosnian Muslim men and boys, with many relatives unable to attend due to the coronavirus disease (COVID-19) outbreak. REUTERS/Dado Ruvic