On August 21 or 22, in the morning, members of the Ukrainian auxiliary police and Gendarmerie (German rural order police) dragged Jewish men and several women, the more assimilated members of the Jewish intelligentsia, out of their houses. Together with men who had been caught on the street, they were taken first to the market place and then to the town's prison. In the prison many were severely beaten (some were shot to death) by Ukrainian auxiliary policemen. At noon several dozen men were taken by truck from the prison to the Jewish cemetery, where they were ordered to dig several pits. When they finished the digging, they were shot to death. Afterward, the rest of the Jewish men were taken from prison by truck to the Jewish cemetery. Upon arriving at the murder site, they were forced in groups of ten into the pit, where they had to lie facedown, and then were shot to death with machine-guns and pistols. Then another group was placed on the top of the bodies and shot to death. Each layer of bodies was covered with lime.
The Gebietskommissar (regional commissar) of Dubno, Werner Brocks, was in charge of these two murder operations.