BJP chief Amit Shah today said the death of 72 children in the last week at a Gorakhpur hospital is "a tragedy, a mistake that happened at some level, but you cannot deny our aim to help," dismissing demands by opposition parties that Uttar Pradesh Chief Minister Yogi Adityanath of his party must resign. Nine children have died in the last 24 hours at the Gorakhpur hospital, and the National Human Rights Commission has sought a report from the UP government within four weeks.