Chiang Mai police trace school threat chat sender

Police have identified students linked to threatening messages shared in a chat group at a well-known private school in Chiang Mai, prompting tightened security at schools across the province on 11 August.

The messages, circulated online after being posted on the evening of 10 August in a Line group for upper-secondary pupils, raised fears of violence at 10am the following day. Police said they had contacted the parents of those involved and would take them for discussions to establish the facts and the reasons behind the posts.

Parents collect children as school steps up checks

The chat reportedly involved two male students. One message threatened a shooting, particularly targeting pupils in classrooms 9 and 10, while another student was reported to have posted an image of a gun.

The school, Montfort College, in Tha Sala subdistrict of Mueang Chiang Mai district, asked officers from Mae Ping Police Station to provide security. Teachers also checked every pupil's bag before they entered, as the school was holding Mother's Day activities.

School executives, Mae Ping police and Chiang Mai Provincial Education Office officials met to investigate. Several parents collected their children from the school after learning of the reports online.

Police Major General Yutthana Kaenchan, commander of Chiang Mai Provincial Police, later said police had identified the students connected with sending the messages.

Province-wide school patrols ordered

Yutthana ordered police in every area to increase security and monitoring at all schools, saying the measure was intended to reassure pupils, teachers, staff and parents.

He urged pupils and parents to follow information issued by schools and authorities, avoid sharing unconfirmed messages and not create alarm that could lead to copycat behaviour.

Chiang Mai police have previously worked with several educational institutions to provide "Run, Hide, Fight" training for pupils and teaching staff. Schools, companies and private organisations seeking the training can contact Chiang Mai Provincial Police or their local police station.

Education officials say the school is operating normally

Chiang Mai's Provincial Education Office visited the school and said conditions there remained normal, although officials continued close monitoring.

The office is preparing province-specific safety measures, including joint preventive activities with relevant agencies, for submission to the Chiang Mai governor, who chairs the provincial education committee, on 18 August 2026.

Pictures courtesy of Matichon

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11 August 2026