Some 500 to 1,000 synagogues were destroyed, mostly by arson.[69] On 11 November, Heydrich reported a death toll of 36 people, but later assessments put the number of deaths at up to two thousand.[70][71] On Hitler's orders, around 30,000 Jewish men were arrested and sent to concentration camps by 16 November.[72] It is likely that as many as 2,500 of these people died in the following months.[70] It was at this point that the SS state began in earnest its campaign of terror against political and religious opponents, who they imprisoned without trial or judicial oversight for the sake of "security, re-education, or prevention".[73][74]