Einsatzgruppe A had already murdered almost all Jews in its area, so it shifted its operations into Belarus to assist Einsatzgruppe B. In Dnepropetrovsk in February 1942, Einsatzgruppe D reduced the city's Jewish population from 30,000 to 702 over the course of four days.[111] The German Order Police and local collaborators provided the extra manpower needed to perform all the shootings. Haberer wrote that, as in the Baltic states, the Germans could not have killed so many Jews so quickly without local help.