Vice-principal Iju Francis Falkau, 54, had called the 14-year-old girl, in his office on January 2 around 1 PM when he allegedly molested her, police said.
Based on a complaint, a case was booked against the accused yesterday under sections 354 (assault or criminal force to woman with intent to outrage her modesty) and 511 of the IPC and subsequently he was arrested today, they said.
Workers of several political parties today protested the alleged offence and demanded strict action against the accused. They gathered outside the school and shouted slogans against Falkau.