Guwahati, Aug 29 (IANS): The Arunachal Pradesh government has set up a medical board to probe the allegations of rape of 13 minor girls by a teacher of a private school, an official said Thursday.

The incident took place in Likabali in West Siang district. The teacher and warden of the girls hostel, identified as Vipin Wisvan, was arrested Tuesday after complaints of sexual assault and molestation were filed by family members of the 13 girl students of the school.

"We are yet to ascertain the crime. All the 13 girls were sent to the health centre in Likabali for medical examinations and the medical reports have negated the possibility of rape," West Siang Deputy Commissioner Manoj Kumar Sahoo told IANS.

"However, we are not taking any chances since the issue is very sensitive and the health centre at Likabali is not properly equipped. The state government has constituted a medical board to examine the allegations," he said.

Sahoo said the medical board members were scheduled to arrive in Likabali from the state capital Itanagar Thursday evening.

He said the incident allegedly took place at the private Green Valley English Medium School. The accused teacher was also the warden of the girls hostel.

The school has around 400 students studying from Nursery to Class 7. The hostel has around 100 inmates.

Locals have alleged the accused committed the crime over a period of three years.

They said the students never reported the acts to their parents or the school authorities fearing "action" from the accused.

The matter came to light Tuesday when one student spoke to her parents.

On Wednesday, a clash broke out between locals and police over the issue in which the school building was partially damaged.

The clash took place when people blocked roads demanding action against the accused. A police inspector was injured.