At least six people were killed and 15 injured in a shooting at Debsirin Nonthaburi School in Bang Kruai district, on Bangkok’s northwestern outskirts, Thailand. National police spokesperson Trairong Piwphan said the incident occurred on Friday. The suspected gunman was also killed in the incident.

Police identified the suspected attacker as a student, but provided no further details. State broadcaster Thai PBS reported that the dead included three teachers and three students. The source did not provide further information about the suspected attacker or the circumstances of the shooting.

An 18-year-old student told Reuters that he initially thought the sounds were fireworks or someone striking an object. He said he did not first realize they were gunshots, describing multiple shots that stopped and then began again. The report cited Al Jazeera as its source.