BANGKOK — A schoolgirl died from critical wounds on Saturday after a student opened fire at a high school and his home outside Bangkok the day before, bringing the death toll from the attack to at least eight people. The 14-year-old opened fire at around 10 a.m. Friday at Debsirin Nonthaburi School in Nonthaburi province northwest of the Thai capital before apparently taking his own life. He also appeared to have killed his two grandparents at his family home earlier in the morning, officials said. The girl, 12, died after hospitalization, the Health Ministry said. The school had posted a message on Facebook Friday seeking blood donations for two students, including the girl, who was in seventh grade. Fourteen people remain hospitalized, of whom seven remain in critical condition Saturday, according to Thailand’s Health Ministry. Most of those wounded were between 12 and 14 years old. Relatives claimed the bodies of eight people from Bangkok’s Institute of Forensic Medicine: five school staff, the accused shooter, and his grandparents. Emergency workers brought out a coffin and loa