The shooter also killed his two grandparents at home prior to the school shooting, Polapee said. Prime Minister Anutin Charnvirakul, speaking after touring the school, confirmed reports that the shooter was 14 years old and killed himself. He said the boy, who lived with his grandparents, had shown signs of stress connected to school. After the class had started for a while, the boy began shooting from inside his classroom, before walking out and continuing shooting. A 14-year-old boy was accused of a 2023 shooting at a major Bangkok shopping mall.