At least 11 patients undergoing treatment died after the oxygen supply was hampered at Sri Venkateswara Ramnarayan Ruia government hospital of Andhra Pradesh's Tirupati on Monday.There was a five-minute lag in reloading the oxygen cylinder that caused the pressure to drop, resulting in the deaths. Chief Minister YS Jagan Mohan Reddy has inquired about the incident at Tirupati Ruia Hospital and sought a report. Watch the video for more information.