Show Quick Read Key points generated by AI, verified by newsroom Student killed teacher, injured four, then died by suicide. Police are investigating motive; previous school shooting occurred February. The shooting occurred at Debsirin Nonthaburi School in Bang Kruai district, north of Bangkok. "There were many shots: bang bang bang. In February, a teacher was killed and a student injured when a gunman opened fire at a school in Hat Yai district in southern Thailand.