German firefighters battled on Friday to control a fire that broke out at a metal technology factory in the southwest of the capital, Berlin. Dark smoke rose from the complex, located in Berlin's Lichterfelde neighborhood. Firefighters said sulphuric acid and copper cyanide were stored at the plant, and when the chemicals ignited, hydrogen cyanide could have formed. The fire brigade issued a hazard warning but later said hazardous substances were only detected in the air in the immediate vicinity of the Diehl Metall plant, not in the smoke that drifted toward the city center. "The building is now completely ... (full story)