At least six people including three students have been killed after a student opened fire at a secondary school in Thailand on Friday morning. Three teachers were killed in the attack at Debsirin Nonthaburi School, on the northern outskirts of Bangkok, while more than a dozen others were wounded, a police spokesperson said. While early reports had quoted police saying the suspected gunman had died, police have confirmed he remains in critical condition and doctors are providing emergency treatment. Gun ownership in Thailand is relatively high compared with other countries in Southeast Asia. In February, a teacher died and a student was wounded in southern Thailand’s Hat Yai district after a gunman opened fire at a school.