At least six people have been killed and more than a dozen others injured in a shooting at a high school on the outskirts of Bangkok, Thailand, according to Thai police.

Authorities said the shooting occurred at Debsirin School in the Bang Kruai district of Nonthaburi province, which borders the Thai capital.

Police said three students and three teachers were among those killed in the attack. More than a dozen other people were injured, although officials have not yet provided details on the severity of their conditions.

Investigators have identified the suspected gunman as a student at the school.

Emergency services and law enforcement officers responded to the campus following reports of gunfire, while authorities began investigating the circumstances surrounding the attack.

Police have not yet released further information about a possible motive or provided additional details about the suspect.

The shooting has prompted concern as authorities work to establish what led to the deadly attack and provide assistance to victims, their families and the wider school community.