The Thai teen behind a deadly school shooting outside Bangkok had an air gun confiscated by a teacher last year and had watched violent content online, police said on Sunday, as the government promised new safety protocols for schools.

The 14-year-old suspect, who later killed himself, had used a gun that belonged to his grandfather, authorities say.

A teenager who shot and killed his grandparents at their home before opening fire at a school in Thailand was seen stalking a corridor and loading his gun during the deadly…

Police say 14-year-old student carried out attack before killing himself