Public Safety Concerns Public Safety Unclear Causes Berlin Fire Cause Investigation Explosion Investigation Unclear Causes of Fires Arson Investigations Brandursache Fire Safety Short Circuits Short Circuit Causes Ongoing Investigations Industrial Fire Causes Fire Incidents Electrical Fires Arson Gelsenkirchen Fire Investigation Unclear Causes of Fire Public Safety Violations Gas Heater Incidents Nuremberg Fire Investigation Defective Equipment Unclear Fire Causes Fire Cause Analysis Electrical Problems Police Investigations Fire Safety Regulations Montreal Fire Investigations Explosive Incidents