Bangkok – Students stood quietly outside their Bangkok school Friday as teachers checked their bags, pockets and even pencil cases under new security measures introduced after last week’s deadly shooting.

Thailand’s government has ordered schools nationwide to step up controls following the Aug. 7 attack near Bangkok, when a 14-year-old killed his grandparents, five school staff and a pupil before turning the gun on himself.

“An incident like this should not have happened in a school,” headteacher Suparong Sawangngamwong said after overseeing the new checks at Bangkok’s Sawasdee Wittaya School.