Abstract: The object of the study is the mechanism of interaction between the investigative units of the internal affairs bodies and the investigation units of the Ministry of Emergency Situations of Russia at the initial stage of conducting a procedural check on the fact of a fire, identifying shortcomings in the organization of this interaction and finding ways to solve the identified problems. Crimes related to fires are under the jurisdiction of both the investigative units of the internal affairs bodies and the bodies of inquiry of the Ministry of Emergency Situations of Russia. However, in the vast majority of cases, when a fire is reported, it is not known whether a criminal act has taken place, and, if so, what is its qualification, based on which the body authorized to carry out a preliminary investigation. In practice, this leads to excessive bureaucratization of the process of procedural verification, unjustified repeated transfers of verification material from body to body, inconsistency of the initial verification measures and partial duplication of the work carried out. The scientific novelty of the study lies in the fact that the attention of the authors is not focused on the issues of the methodology of fire investigation, but on the organizational aspects of this process that affect the efficiency of solving crimes of this category and preventing the occurrence of such a problem as the loss of criminally significant information, the result of which is extremely low efficiency of the process of disclosure and investigation of crimes with increased labor costs. Based on the results of the work carried out, significant problematic issues related to the conduct of initial investigative actions on the fact of a fire have been identified, and solutions have been proposed to improve the effectiveness of solving crimes related to fires