The discovery came just three days ahead of the "March of Death" from Potocari to Srebrenica, in eastern Bosnia, which would follow the route where some 8,000 Muslim boys and men were shot while trying to run from Serb forces in 1995.
The central ceremony at the memorial site is set to take place on 11 July.
In July 1995, Serbian forces overran Srebrenica, which had been declared a UN "safe area." They separated some 8,000
Muslim men and boys from their families and later executed them.
It is widely considered to have been the worst atrocity in Europe since the Holocaust.
The Film That Shook Belgrade
Belgrade's Ambiguous Response To Srebrenica
Ten Years After Srebrenica