As teams dig in the thick clay they hope to find answers for trials in The Hague and bring peace to families still searching for the dead.
Bosnia reburied another 409 victims of the Srebrenica massacre on the 18th anniversary of Europe's worst atrocity since the Holocaust.
The trial of Ratko Mladic, which the world has been waiting years for, has been adjourned indefinitely.
The city of Homs in Syria has the potential to see a massacre like the one in Srebrenica in 1995 the Foreign Secretary has warned.
William Hague said that while it was a welcome move that women and children were being allowed to leave the area he said: "I think there should be a real fear." Adding that there was a question over "what will happen to the men and the boys that are left?"
The war in Bosnia saw Europe's worst mass killing since the Holocaust as around 8,000 Muslim men and boys were killed by the Bosnian Serb forces.
More than 150 bodies have been recovered from a mass grave found in Tomasica near Prijedor in northern Bosnia and Herzegovina, more than 20 years after the war which claimed the lives of more than 11,500 people.
The latest mass grave to be uncovered was believed to have contained 1,000 bodies when it was originally dug in the summer of 1992, but it is thought some may have been moved to another mass burial site and it will take months of digging to establish how many bodies remain at Tomasica.
The war in Bosnia saw Europe's worst mass killing since the Holocaust during World War Two as around 8,000 Muslim men and boys were killed by the Bosnian Serb forces, many died in detention camps.
The conflict also saw the longest siege in modern history. The Serb siege of Sarajevo went on for 44 months - 11,825 days - longer than the World War II siege of Leningrad, now St. Petersburg, Russia.
As forensic teams continue to uncover bodies in a mass grave in northern Bosnia, one woman has said that she is still waiting for the bodies of her brother and husband.
Nasiha Klipic told ITV News: "I have come to this cemetery for many years and I see each and every one of these buried people as my brothers – as my family.
"But I would feel a lot better if my brother and my husband finally found their final resting place here."
However, she said that even if the bodies of her relatives were found she would not rest until all those responsible were held to account.
"It would not be the end for me, the end for me would be when all the war criminals are arrested.
"I will not stop until the day I die and I raise my children not to stop until the day they die, until all the war criminals are arrested. Nothing less than that would be the end for me."
It is hoped further evidence found at the huge grave site could help the trials of Ratko Mladic and Radovan Karadzic, who are currently facing charged at The Hague.
Survivors of the detention camps during the Bosnian war have said that the recent discovery of a mass grave reminded them that it could have been them.
One survivor told ITV News: "The first feeling is that gosh, this could have been me, one of these bodies."
The discovery of a mass grave in northern Bosnia and Herzegovina has brought hope that more evidence could be found for the trial of Ratko Mladic and Radovan Karadzic who are facing trials at the War Crimes Tribunal in The Hague.
Eldar Jahic from the prosecutor's office has told ITV News that teams from The Hague have already visited the site.
A United Nations court has convicted six senior Bosnian Croats of atrocities against Muslims during the Bosnian war.
The war crimes trial of ex-Bosnian Serb commander General Ratko Mladic has been delayed by a judge in The Hague due to "errors" by prosecutors in disclosing evidence to defence lawyers.
Alphons Orie told the UN Yugoslav war crimes tribunal today he was delaying the case due to "significant disclosure errors" by prosecutors who are obliged to share all their evidence with Mladic's defence team.
He says judges are still analysing the "scope and full impact" of the error.