Chennai, Jul 18 (IANS): Two teachers of a private residential school in Tamil Nadu's Kalakurichi were arrested on allegations of mental torture of a Class 12 student who committed suicide, police said on Monday.

The arrested have been identified as Haripriya, Mathematics teacher and Keerthika, Chemistry teacher. The Chairman, Secretary and Principal of the school were already arrested.

The two teachers were arrested after the mother of the deceased student filed a complaint stating that these teachers had caused mental torture of her daughter leading to her death.

The girl student was found dead on July 13 and parents were informed that the student had committed suicide by jumping from the third floor of the school hostel building.

The family and friends of the student, including student organisations alleged that the girl was tortured by the teachers leading to her death.

The student organisations, family and friends had been conducting peaceful protests ever since she died on July 13. However on Sunday, the situation went out of control and protesters pelted stones and bottles at the police who retaliated by lathi-charge and later resorted to firing tear gas shells. This led to chaos and the protesters barged into the school building and vandalised it. School buses and police vans were torched.

Several policemen, including Inspector General of Police M. Pannyan and Superintendent of Police Selvakumar and 30 other policemen were injured in the stone pelting.

The father of the deceased student has, in the meanwhile, moved the Madras High court for a fresh post-mortem.