German police plan further arrests as they investigate a far-right group that prosecutors say was preparing to overthrow the state and install a former member of a German royal family as national leader. Investigators have said the group, many of whom were members of the Reichsbuerger (Citizens of the Reich) movement, planned to install aristocrat Heinrich XIII Prinz Reuss as leader of a new state and found evidence that some members planned to storm the Bundestag and arrest lawmakers. Heinrich is a descendant of the royal House of Reuss in the eastern state of Thuringia. Aged 71, he has been...