A terrorism investigation was launched in Germany on Thursday after police discovered bomb-making materials in the possession of a 16-year-old boy suspected of planning an attack at a school. The boy was arrested in his room in a pre-dawn raid with his parents present and was subsequently questioned as a terrorism investigation was launched, a spokesperson for the prosecutor’s office said. The parents were also interrogated. Herbert Reul, the interior minister of the state of North Rhine Westphalia, said bomb-making materials, other explosive substances and far-right extremist writings had bee…