From an account by Kurt Gerstein, a member of the S.S. between 1941 and 1945, of what he witnessed at Belzec, one of the Operation Reinhard death camps:
Inside the people were still standing erect, like pillars of basalt, since there had not been an inch of space for them to fall in or even lean. Families could still be seen holding hands, even in death. It was a tough job to separate them as the chambers were emptied to make way for the next batch. The bodies were tossed out, blue, wet with sweat and urine, the legs soiled with faeces and menstrual blood. A couple of dozen workers checked the mouths of the dead, which they tore open with iron hooks. "Gold to the left, other objects to the right!" Other workers inspected anus and genital organs in search of money, diamonds, gold, etc. Dentists moved around hammering out gold teeth, bridges and crowns.