After a delay due to an explosion at a police blasting site in Berlin’s Grunewald forest, fire fighters began extinguishing a fire burning in woodlands nearby, the fire brigade said on Thursday. Earlier, emergency forces said an area of roughly 1.5 hectares was affected. However, the fire spread considerably during the day, to cover some 50 hectares by evening, according to fire brigade spokesperson Thomas Kirstein. However, it was “not all completely on fire, some areas are just smoking,” he added. Residential areas are not in danger, however, according to firefighters. In the afternoon, fire…