The disturbance of interpersonal communication and stages of social conflict in people of Sydybyl (Yakutia) and Beslan (North Ossetia) after disaster with children death are considered. The basic psychological need of persons who lost their relatives during the disaster is a search for those guilty of the tragedy. As a consequence, a community splits into two groups, "victims" and "guilty". "Victims" also singled out a group of "those who suffered less" and accused them of insufficient efforts to rescue children of "victims". It is suggested that the persistent search for guilty people represents a form of psychological defense against the unbearable feeling of their own guilt before dead children. The universal, non-related to ethnic or cultural factors, characteristics of the phenomena described are emphasized. Such type of local social conflict that may be called indigenous has a negative effect aggravating social and economic consequences of the disaster.