Altogether, 14 persons have been taken into custody in the case, Additional Deputy Commissioner of Police Biswajit Ghose said, adding, eight of them did not have any connection with the Christ Church Girls' High School at Dum Dum.
Of the 11 persons arrested during the day, nine were produced before the additional chief judicial magistrate's court in Barrackpore and were remanded to three-day police custody.
Meanwhile, teachers of the school today visited the house of Oindrila Das and consoled her parents.
On September 12, the school's principal Helen Sarkar was arrested on the charge of negligence of duty after she resigned as principal under pressure from guardians who, along with outsiders, ransacked the school in protest against the alleged confinement of Oindrila in a toilet by seniors, which allegedly led to her death subsequently.
Governor M K Narayanan yesterday had ticked off the parents who had indulged in ransacking school offices after the death of Oindrila, saying, "I am depressed.