At the Trebs oil field of Bashneft-Polyus, a branch of Bashneft. At the Trebs oil field of Bashneft-Polyus, a branch of Bashneft, there was a depressurization of a high-pressure hose. In the course of the accident four people were injured, one of whom died. The Ministry of Emergency Situations and the press service of the government note that the oil spill was avoided.