 According to Amnesty International, thousands may be buried in unmarked graves including up to 5,000 civilians who disappeared since the beginning of the Second Chechen War in 1999.In 2008, the largest mass grave found to date was uncovered in Grozny, containing some 800 bodies from the First Chechen War in 1995.Russia's general policy to the Chechen mass graves is to not exhume them.