The head of the Bosnian Federation missing persons commission, Jasmin Odobasic, said on Thursday that 100 bodies had so far been exhumed from the mass grave in Kevljani.
Documents had been found on the bodies of 10 Muslims and three Croats confirming that they were prisoners from the Omarska camp.
The commission will continue the exhumation and the exact number of bodies buried in the mass grave has not yet been determined, Odobasic said.
There are a number of mass grave sites in that area and they are believed to be containing the bodies of a large number of Muslims and Croats who disappeared in the municipality of Prijedor during the 1990s war. Most of them are thought to have been killed after being interned in the Omarska camp.
More than 26,000 people went missing during the 1992-1995 war in Bosnia-Herzegovina and more than 10,000 of them are still unaccounted for.