Polish and German historians estimate that during the 1944 Warsaw Uprising up to 200,000 civilians perished. Already in 1944 "SS-Gruppenführer" Heinz Reinefarth claimed 250,000 dead, which is now considered exaggerated by him for propaganda purposes. Historian Hans von Krannhals claims that at least 10 percent of the victims were killed in mass executions committed by regular German troops, including by Hermann Göring Divisions such as the 1st Infantry Division across Praga, the 2nd Motorized Division in Czerniaków, the 25th Panzergrenadier Division in Marymont as well as the 19th Panzer Division in Praga and Żoliborz districts. The atrocities were closely connected with the planned destruction of Warsaw by Hitler who threatened to "turn it into a lake". The most severe of them took place in the Wola district, where at the beginning of August 1944 tens of thousands of civilians (men, women, and children) were methodically rounded-up and executed by "Einsatzkommandos" of "Sicherheitspolizei" operating within the Reinefarth's group of forces under the command of Erich von dem Bach-Zalewski. Executions in the Wola district, referred to as the Wola massacre, also included the killings of both the patients and staff of local hospitals. The victims' bodies were collected and burned under pain of death by the members of the "Verbrennungskommando" made up of captured Polish men. The carnage was so bad that even the German high command were stunned.