Tirupati: A 14-year-old student was severely injured and is battling for life after her classmate pushed her down from the second floor of the school building in Tirupati on Saturday. Tirupati East police said during an altercation between class IX girl students at Sri Chaitanya Techno school in Tirupati, one of the students pushed Sneha, who fell from the second floor of the building and sustained severe injuries. School authorities rushed her to a private hospital in the city. Her condition is said to be critical. Police are set to register a case and investigate further.