At least 22 people have been injured in an explosion in the paddock area at the Nürburgring motor-racing track in Germany – on the evening before the six-hour Ruhr Cup race. Some of the injured were taken to hospital by rescue helicopter, a spokesman for the VLN Endurance Championship Nürburgring said. One person suffered severe injuries and three others were seriously injured, police said. According to initial findings, the explosion occurred shortly after 6 pm (1600 GMT) on Friday behind a pit lane, and is believed to have been caused by a pressurized gas cylinder. At the time of the acciden…