By The Nation
The 57-year-old woman said a teacher took the girl to his office and raped her twice every month, adding that he let his colleagues and students join in as well. She added that the rape was also conducted in the classroom.
However, other students have denied witnessing any such incident.
Mayuree Uengtrakul, from the Department of Children and Youth, has visited the family and given them advice on dealing with the trauma.
Police have also launched an investigation into seven individuals, including five teachers and two students aged 21 years.