The main cause of PE with deep-water device in Bernecia sea was a Fire in the battery compartment, the head of the defense Ministry Sergei Shoigu at a meeting with Vladimir Putin. Then the fire spread to other rooms, but it's not incapacitated for a nuclear installation, he added. The head of the Ministry of defence also expressed the hope that the device will be restored in the shortest possible time. Fire research deep-sea submersible took place on 1 July. Lost the lives of 14 people, out to save. The details of the incident are not disclosed, because this information belongs to the category of state secrets. It is only known that the sailors engaged in the study of the hydrosphere. As told in the Ministry of defence, submarine cost the lives of eliminated source of fire. All the dead officers will present to the state awards, families will provide the necessary assistance. on Thursday at a meeting with Putin, Shoigu said that with the relatives of the victims of the tragedy employs a special group. "Those families who have minor children, will be secured to adulthood to the extent of allowances that have received their husbands in this life ", - reported the head of the Ministry. <span style="color:darkgray