Three days after a minor girl was allegedly sexually abused inside a south Kolkata school by two physical training (PT) teachers, parents and guardians of students on Sunday held a sit-in protest demanding their children's security and arrest of the school's principal. The agitating parents first blocked the road near the school premises in south Kolkata's Ranikuthi and then marched to Tollygunj where they held the sit in. The protesters were joined by several parents of students from other prominent schools in the city.