New Delhi: The Delhi Police on Thursday arrested the principal and four other staff of a local private school where a six-year-old boy died after falling into an open septic tank.

Those arrested on charges of causing death due to negligence are school principal Sandhya Sabu, 50; class teacher Minakshi Kapoor, 38; reverse osmosis plant operator Yogesh Kholiya, 23; maintenance incharge Puran Singh Bisht, 65; and gardener Ram Narayan, 44, a police officer said.