A student opened fire Friday at Debsirin Nonthaburi School northwest of Bangkok, killing at least six people and injuring others, Thai police said. Officials were still reconciling conflicting death and injury counts in the first hours after the attack. Royal Thai Police said the shooting occurred at Debsirin Nonthaburi School in Nonthaburi province. A police spokesperson reported three teachers and three students killed.
The same police account reported fifteen injured with two in critical condition. Thailand's health minister separately reported twenty-two injured with nine in critical condition and said some injuries came from falls. The source record attributes statements, allegations and official descriptions to the people or institutions making them.
Early mass-casualty reports often change as hospitals and police reconcile patients. Thailand experienced another fatal school attack in February 2026. The prime minister directed officials to support victims and their families. This background supplies chronology and operating context without deciding the outcome still under review.
A deputy interior minister reported five teachers killed and said the student also killed two grandparents before going to the school. Police said the motive remained under investigation. Police believed the firearm came from a member of the student's family. Counts, dates and legal status remain tied to the checked source record because later reporting can revise preliminary information.
The evidentiary limit is specific: Authorities gave conflicting casualty totals, the motive was unknown, and early accounts differed on the shooter's final condition. The available reporting does not support an inference beyond that boundary.
The next record points are a consolidated official casualty statement and police findings on the weapon, sequence and motive. Each can be checked against later official documents or independent reporting.
The verified chronology is therefore limited to the following: Royal Thai Police said the shooting occurred at Debsirin Nonthaburi School in Nonthaburi province. A police spokesperson reported three teachers and three students killed. The same police account reported fifteen injured with two in critical condition. Thailand's health minister separately reported twenty-two injured with nine in critical condition and said some injuries came from falls. A deputy interior minister reported five teachers killed and said the student also killed two grandparents before going to the school. Police said the motive remained under investigation. Police believed the firearm came from a member of the student's family. The relevant context is Early mass-casualty reports often change as hospitals and police reconcile patients. Thailand experienced another fatal school attack in February 2026. The prime minister directed officials to support victims and their families. These details state what the sources establish and preserve what remains unknown.