Police in the northern German state of Lower Saxony mobilized overnight to Thursday, searching a mosque in Hildesheim run by city’s German-speaking Muslim community organization (DIK Hildesheim). Police also raided eight apartments belonging to board members of the DIK Hildesheim. “The DIK in Hildesheim is a national hotspot for the radical Salafist scene,” Lower Saxony’s state interior minister, Boris Pistorius, said in a statement. “After months of preparation, with these raids today, we have taken an important step towards banning the group.” In the southwest, investigators have arrested a 15-year-old who they believed to have been planning a mass-shooting similar...