More than 1,000 victims of the 1995 Srebrenica genocide in Bosnia remain missing even after 31 years, according to a report published Friday by Turkey’s Anadolu Agency. The massacre, carried out by Serb forces during the Bosnian War from 1992 to 1995, is regarded as one of the darkest chapters in modern European history.

The genocide occurred when Serb troops led by convicted war criminal Ratko Mladic captured the UN-declared safe zone of Srebrenica on July 11, 1995. After separating men and boys from women, the forces executed them over 11 days, killing at least 8,372 Bosnian males. To conceal the crimes, victims’ bodies were buried in mass graves across multiple sites.

Since the war’s end, Bosnian authorities have recovered remains from 77 mass graves and 150 locations, using DNA and forensic testing for identification. As of this year, 6,782 victims have been buried at the Srebrenica memorial cemetery, with 250 others laid to rest in their hometowns. Despite ongoing efforts, more than 1,000 victims remain unaccounted for.