Students streamed out of the Debsirin Nonthaburi School, on the northwestern outskirts of Bangkok, as the wounded were loaded onto ambulances and teachers hugged each other and cried.
In photos circulated by emergency workers, one person is seen lying down on a stretcher outside an ambulance, while another is attended to by a medic.
Lt. Col. Trirong Phophan, a spokesman for the National Police, told Reuters the suspected shooter was among the seven people killed. Fifteen people were injured, he added.
One 18-year-old student told Reuters he initially thought there were firecrackers going off or someone banging an object.
“I didn’t think it was a gun at first,” he said. “There were many shots: bang bang bang. Then it went quiet. Then it started again.”
“It’s such a terrible incident. It should never have happened. How could this happen in our country?” Prime Minister Anutin Charnvirakul told reporters at Bangkok’s Government House.
Education Minister Prasert Jantararuangtong told Reuters that both teachers and students were among those reported dead.
Police identified the perpetrator as a student. It is the second school shooting in Thailand this year after a teacher died and a student was injured in the south of the country in February.
Emergency worker Kiatikhun Verapongpradith, 47, described arriving as the shooting was ongoing and his team treated students with injuries in the back, chest and arms. They found a male teacher lying dead on an upper floor of the school, and in another room they found a female teacher with wounds in her chest and arm.
“We gave CPR for about 30 minutes and rushed her to the hospital as we could not get her heart rate up, but we tried our best,” he said.
Traffic near the Debsirin Nonthaburi School in Nonthaburi was nearly at a standstill, an AFP journalist saw, with local media reporting that parents were picking up their children following the incident.
In the 2025 academic year, the school had an enrollment of around 3,100 students and 147 teachers, according to district authorities.
Deputy Education Minister Akkharanan Kannakittinan said in a statement he was coordinating to provide assistance.
Gun ownership and gun violence are not uncommon in Thailand, which has seen a series of deadly shootings in the past six years, with children among the victims.
Thailand’s worst mass killing by a single perpetrator in its recent history took place in 2022, when a former policeman ran amok in a three-hour gun-and-knife attack in the northeast that killed 36 people, including 22 children stabbed as they slept at a daycare centre.
A gunman killed five people, including security guards and a vendor, at a Bangkok market in July 2025 before turning the gun on himself, while a teacher died in the southern city of Hat Yai in February this year when a shooter opened fire at a school where she worked.
In 2020, a soldier killed 29 people in a shooting rampage in Nakhon Ratchasima. And in 2023, a 14-year-old used a modified handgun to kill two people and wound five others at a luxury Bangkok shopping centre.
Shots were reported from the Nonthaburi branch of the Debsirin School on the outskirts of the capital Bangkok, just after 10:00 local time (03:00 GMT). Six people have died in the shooting, police have told reporters at the scene.
Thai police had earlier said that the suspected shooter is also dead. At least 15 people are injured - of which two are in a critical condition, police say.
Videos from the scene show staff rushing students out of the classroom and police officers trying to find the shooter.
According to the police, he was a 14-year-old student at the school who opened fire on teachers and fellow pupils before taking his own life.
The injured were treated by paramedics before being taken to hospital.
This shooting follows another at a school in southern Thailand in February. That incident raised questions, which will now surely be asked again, about the easy availability of guns in Thailand.
We just spoke to a seventh-grade student who has fled the building. She says she was in her classroom when she saw the shooter walking from room to room.He then shot the teacher who was standing in front of her classroom, she says. She couldn't see anything else after that, she recalls.