On the night of July 23-24, 1942, German forces, including the Security Police, the Gendarmerie, and the auxiliary police, came over from Słonim and surrounded Dereczyn. Intending to liquidate the ghetto, they began to round up the Jews on the morning of July 24. According to Soviet documents, the shootings lasted from July 23 to July 26, 1942. During the operation, many Jews, who had built shelters for themselves beforehand, were found by the Nazis and killed either on the spot or in Bliznianski's fields. They were later buried in nine bomb craters, some of which lay within the town limits, while the rest were located in Bliznianski's fields.

More information: Yad Vashem

On April 30, 1942, the occupiers shot about 150-200 Jews (the figure varies depending on the source) from Dereczyn near the village of Rodziszki, approximately 4 km north-northwest of the town. The pretext for the massacre was the desertion of some workers from a forced labor site. The victims included not only the "deserters" themselves, but also their families, as well as some randomly picked Jews.

More information: Yad Vashem