rom the school, said 23 people were wounded and 10 were in critical condition, with most suffering gunshot wounds. Earlier reports gave conflicting casualty numbers.

The school said all classes will be suspended from Aug. 10-14, and school staff are instructed to work from home in that period.

Police find grandparents dead at family home

After the school shooting, police went to the home of the shooter's grandparents but the door was locked and there was no response to their calls, regional police Commander Wattana Yeejeen said.

Officers broke the door lock and found both the grandparents had died of apparent gunshot wounds, Wattana said.

Police spokesperson Trairong Piwpan said the boy appeared to have shot his grandparents first before attending school as normal. After the class had started for a while, the boy began shooting from inside his classroom, before walking out and continuing shooting.

He said the boy fired more than 20 shots and more than 30 rounds were found on him after he shot himself.

Several family members of the alleged shooter, including his uncle and sisters of the grandfather who were at the family home while police investigated, said he usually kept to himself and was a good student.

The family members said they were unaware of any troubles he faced at home or school.

Thailand has high rate of gun owners

Thailand has one of the highest rates of gun ownership in Asia, second only to Pakistan but far surpassing its Southeast Asian neighbors.

Data collected in 2017 by the groups Small Arms Survey and GunPolicy.org in their last extensive international study found civilian gun ownership in Thailand was about 15.1 guns per 100 people, compared with less than one per 100 in neighboring Malaysia.

Thailand had 3.49 deaths by firearms per 100,000 people, according to 2023 statistics published by World Population Review. That puts it well behind parts of Latin America and the Caribbean, but relatively high in Asia. Only the Philippines is higher in Southeast Asia.

In February, a 17-year-old stole a gun from police and opened fire at a public high school in southern Thailand, briefly taking people hostage in a two-hour attack that killed one person and injured two others.

A 14-year-old boy was accused of a 2023 shooting at a major Bangkok shopping mall.

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Jintamas Saksornchai in Bangkok and Kaweewit Kaewjinda in Nonthaburi, Thailand, contributed to this report.

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