Police Release Timeline of School Shooting in Nonthaburi

On August 9, 2025, Deputy Commander of Region 1 Police Arthapol Anusit, along with Nonthaburi Provincial Police Commander Detchrapee Kongdee and investigation teams, held a meeting to review progress in the case following interviews with nearly 20 witnesses—including 6-7 student friends and classmates, with the remainder being teachers. The meeting outlined a four-phase timeline of events.

Phase 1 began when the shooter arrived at school, participated in the national flag ceremony, and fired at the first teacher, killing them in room 3/8 on the sixth floor at 9:53 a.m.

Phase 2 involved gunfire in Building 5 on floors 6 and 5. After shooting the first teacher, the shooter moved to room 565 and killed two more teachers and wounded one student. At 9:54 a.m., he moved to floor 5, changed magazines, and attempted to fire but the weapon malfunctioned. He then descended to floor 4 and shot the assistant director and secretary. Police from Prai Bang Station arrived at 10:02 a.m.

Phase 3 saw continued shooting on floors 3, 2, and 1, with attempted attacks on groups of teachers and students. He encountered a janitor but did not harm them, as they were not school staff. He then moved to Building 4 while reloading.

Phase 4 involved a confrontation with police after they arrived at 10:02 a.m. and requested backup at 10:03 a.m. Officers attempted negotiations and ordered the shooter to stop firing. At 10:10 a.m., the shooter took his own life. Investigators then executed a tactical clearance of Building 4.

Following the meeting with all relevant agencies, evidence and the shooter's mobile phone records are being examined to gather evidence and determine motive. Another press briefing will be held.