Approximately six million Jewish men, women, and children were killed during the Holocaust by the Nazi German regime and its allies. This number is based on extensive Nazi documents, demographic studies, and historic research. The murders occurred through various methods including poison gas in killing centers, mass shootings, violent acts, and harsh conditions in ghettos, labor camps, and concentration camps. The six million figure is widely accepted by historians and Holocaust memorial institutions as the best estimate of Jewish deaths during this genocide.