Sites have been discovered in all regions of the country and contain members of every major religious and ethnic group in Iraq as well as foreign nationals, including Kuwaitis and Saudis. Over 250 sites have been reported, of which approximately 40 have been confirmed to date. Over one million Iraqis are believed to be missing in Iraq as a result of executions, wars and defections, of whom hundreds of thousands are thought to be in mass graves.