What is the cause of the fire in southern Tehran? According to the monitoring of the Refining and Broadcasting Company, the flame and smoke seen from south of Tehran are related to the refinery in Tehran; The burning flame is also due to the increase in ignition. According to preliminary information, a sudden power outage led to the stoppage of the refinery's activity and then to the increase of the flare-up; Refinery officials are investigating the cause of the power outage.