A 12-year-old schoolgirl died from critical wounds on Saturday, a day after a 14-year-old student opened fire at a high school and his family home outside Bangkok, raising the death toll from the attack to at least eight people.

The shooter opened fire at approximately 10 a.m. Friday at Debsirin Nonthaburi School in Nonthaburi province, northwest of the Thai capital, before apparently taking his own life, officials said. He is also believed to have killed his two grandparents at the family home earlier that morning.

The 12-year-old victim, a seventh-grade student, died after being hospitalized, according to Thailand's Health Ministry. The school had posted a message on Facebook on Friday seeking blood donations for two students, including the girl.

Fourteen people remain hospitalized, seven of them in critical condition as of Saturday, the Health Ministry said. Most of those wounded were between 12 and 14 years old.

Relatives claimed the bodies of eight people from Bangkok's Institute of Forensic Medicine: five school staff members, the accused shooter, and his two grandparents. Emergency workers loaded a coffin onto an ambulance for transport to the victims' hometowns for funeral rites. The young girl's body had not yet been released.

Wiroon Supasingsiripreecha, head of the institute, said most of the victims suffered a single fatal gunshot wound to a vital area, including the chest or head. He noted that the gunshot wound found on the alleged shooter was consistent with the weapon he had used. More detailed forensic findings, including toxicology results, are expected at a later date.

Officials described the firearm as small and compact and said it was legally registered to the boy's grandfather. Thailand sets a minimum age of 20 for firearm ownership and requires background checks, but the case echoes a recurring concern in Thai mass shootings: legally registered weapons accessed by relatives or unauthorized users. There were reports that the boy, who lived with his grandparents, had shown signs of stress connected to school, though some relatives told Thai media they were unaware of any difficulties he may have been experiencing.

The co-educational state school, which has roughly 3,000 students aged 12 to 18, announced that all classes would be suspended from Aug. 10 through Aug. 14 and that school staff were instructed to work from home during that period.

A small number of mourners laid flowers Saturday morning at the school's gate, where a few police officers were stationed. Charin Siriananchai brought his two sons, ages 9 and 6, to pay their respects. He said that while his sons do not attend the school, he lives in the neighborhood and drives past it almost every day, often stopping to allow students to cross the road.

"Everyone was saddened and shocked, because it was unexpected that this would happen in Thailand, and also it's quite a great loss," he said.

Some parents arrived with their children to collect belongings left behind during the shooting. A father, who declined to identify himself, said his son, who was at the school during the attack, remained in shock and could not sleep alone.

Thailand has one of the highest rates of civilian gun ownership in Asia, second only to Pakistan and far exceeding its Southeast Asian neighbors. Data collected in 2017 by the Small Arms Survey and GunPolicy.org in their last extensive international study found civilian gun ownership in Thailand at approximately 15.1 guns per 100 people, compared with fewer than one per 100 in neighboring Malaysia.

Thailand recorded 3.49 firearm deaths per 100,000 people, according to 2023 statistics published by World Population Review. That figure trails parts of Latin America and the Caribbean but is relatively high for Asia, with only the Philippines recording a higher rate in Southeast Asia.

While indiscriminate mass shootings are not common in Thailand, the country has experienced an increase in high-profile shooting incidents in recent years. In October 2022, a former police officer killed 36 people, including 24 children, in a gun and knife attack at a childcare center in Nong Bua Lamphu province, one of the deadliest such attacks in the country's history. In February, a 17-year-old stole a gun from police and opened fire at a public high school in southern Thailand, briefly taking hostages in a two-hour attack that killed one person and wounded two others. A 14-year-old boy was accused in a 2023 shooting at a major Bangkok shopping mall.