The massive problems with the train network in northern Germany on Saturday morning were caused by external influence in Berlin and the western state of North Rhine Westphalia, according to federal police. Police located two crime scenes, one of which is in the Berlin district of Hohenschönhausen, a police spokesperson said, without specifying the location of the other, in North Rhine Westphalia. Officers are investigating at full speed, he added. “At present, it can be assumed that there was targeted external interference with [railway operator] Deutsche Bahn cables.” German Transport Ministe…