The man was arrested on Tuesday and remanded to judicial custody, police added.
A 50-year-old private vehicle dealer was arrested at nearby Kalapet village on Tuesday for allegedly sexually abusing his two minor daughters. Balasubramanian had been sexually abusing the girls for the past few months, police said.
The matter came to light after the girls narrated their ordeal to the staff of Childline during a counselling session at the school a few days back, they said.
The girls, aged 13 and 14, were later produced before the Child Welfare Committee (CWC) which recorded their statements and also of their mother.
CWC, later, lodged a complaint with the police in Kalapet and a case was registered under section 10 of the Protection of Children from Sexual Offences Act.
The man was arrested on Tuesday and remanded to judicial custody, police added.