Two out of the seven pupils from Sekolah Menengah Kebangsaan Dato Syed Ahmad, Kuala Nerang, who were treated at Hospital Kuala Nerang (HKN) for food poisoning yesterday were discharged Tuesday.

Kedah Health director Dr Ismail Abu Taat said the five other pupils were undergoing treatment and were reported to be in stable condition.

He said the food poisoning was caused by ‘ayam masak merah’ believed to be infected by a type of salmonella bacteria, because the chicken were not preserved properly.

Yesterday a total of 158 pupils at the school had diarrhea and vomiting, 117 pupils received out-patient treatment at the hospital before 110 pupils were allowed to return to the boarding school.