A Class 1 student was attacked with a knife, allegedly by a senior, in the toilet of a school in Uttar Pradesh's Lucknow, in a case that is chillingly similar to the murder of a seven-year-old at Gurgaon's Ryan International School last year. A Class 6 girl attacked the child, the police said. The principal of the school, who allegedly hid the incident for a day, has been arrested for negligence.