The Nikolaev Massacre was a massacre which resulted in the deaths of 35,782 Soviet citizens, most of whom were Jews, during World War II, on September 16–30, 1941. It took place in and around the Ukrainian city of Mykolaiv and the neighboring city of Kherson in (current) southern Ukraine. The massacre was carried out by German troops of Sonderkommando 11a and Einsatzkommando 12, which were subunits of Einsatzgruppe D under the command of Otto Ohlendorf. The killings were committed by many of the same troops who carried out the massacre at Babi Yar, and the victims were counted and described in an Einsatzgruppen document dated October 2, 1941 as "Jews and Communists". This document was entered into evidence at the Nuremberg Trials as NO-3137.