BANG KRUAI, Thailand: When a shot rang out at the Debsirin Nonthaburi School on the outskirts of Bangkok on Friday morning (Aug 7), 14-year-old Khim and her classmates peered over a balcony to see if the noise had come from a construction site. Over the next 40 minutes or so, the alleged gunman - another 14-year-old student - ran amok, killing three teachers and two school officials, before turning the gun on himself. In all, nine people have been killed and another 23 wounded, in Thailand's worst mass shooting since 2022, which has reignited debate over firearms control in Southeast Asia's largest gun-owning nation. The tragedy had actually begun hours earlier, when the alleged gunman shot dead his grandparents at their home at dawn. He then took a bus to the school, 18km away, where he pulled out a gun and started shooting just before 10am, police said.