A student opened fire at a high school outside Bangkok on Friday, killing at least 5 people and wounding more than 20, according to authorities. The 14-year-old shooter took his own life at the school.

Shooting Details

Five school staff members, including teachers and administrators, died in the shooting around 10 a.m. at Debsirin Nonthaburi School in Nonthaburi province northwest of Bangkok. The boy also killed his grandparents at the home he shared with them prior to the school shooting.

Bangyai Hospital, about 5 kilometers from the school, said 23 people were wounded, of whom 10 were in critical condition, with most suffering gunshot wounds. A witness said students hid inside a classroom while they heard gunshots from another building before police officers knocked on the door and cleared a way for them to leave the building.

Investigation

Police find grandparents dead at family home. After the shooting, police went to his home and found both grandparents dead of apparent gunshot wounds. The student appeared to have shot them before attending school as normal.

Original reporting: Texarkana Gazette — read the source article.