A 15-year-old boy was killed when a pistol was fired in a classroom at a Nonthaburi school, in an incident students and teachers initially pinned on a computer “explosion”. The incident took place Thursday afternoon in a computer class at Wat Lad Pla Duk School in tambon Bang Rak Pattana of Bang Bua Thong district, said Pol Capt Saiyon Thongtha, a duty officer at the Bang Bua Thong police station. The student, later identified as Noppasil Ngamsud, sustained serious injuries to his face, including a wound about 3–4 centimetres deep near his left eyebrow, police said. Medics rushed to the scene …