Several people have been killed in a shooting at a Jehovah’s Witness centre in Hamburg, with the gunman believed to be among the dead, German police said Thursday. The first emergency calls were made around 2015 GMT after shots rang out at the building in northern Hamburg, a police spokesman at the scene said. “Several people were seriously injured, some even fatally," police said on Twitter. “At the moment there is no reliable information on the motive of the crime," they added, urging people not to speculate. Police sounded the alarm for “extreme danger" in the area using a catastrophe...