This article summarizes the findings relating to a spatially localized group of graves at the Andronovo (Fedorovka) cemetery Tartas-1 in the Baraba forest-steppe. Several rows of graves combine with ash pits suggestive of ritual activity. In the infill of graves, there were ash lenses with mammal and fish bones, and potsherds with traces showing the signs of applied heat. Ash had been taken from nearby ash pits with similar infill and artifacts. Faunal remains from graves and ash pits (limb bones of cattle, sheep/goat, and horse) indicate sacrificial offerings. In the ash layer of grave No. 282, there was an incomplete human burial, also believed to be a sacrifice. Features such as the orientation of the graves, their alignment, the position of human remains, and the grave goods in that area are similar to the Andronovo (Fedorovka) burial practice and do not differ from those in other parts of the cemetery. No complete parallels to this rite have been revealed. Some similarities, such as the use of ash, and the presence of animal bones, sacrificial pits, etc. at other sites are listed. A reconstruction of the funerary sequence and possible interpretations are considered. It is concluded that those graves were left by a group of Andronovo migrants who maintained close ties with the native population. Unusual features of the burial rite, therefore, can reflect an attempt to consolidate the immigrant groups on the basis of traditional ritual practices, where the major role was played by fire and its symbols.