 Police say the marquee where the event was being held was massively overcrowded, with a quarter of a million people crammed in, even though the religious gathering only had permission to allow in 80,000. The police say they want to question the religious leader at the event, Narayan Saka Vishwahari. While South Asia regional editor Ambarasan Etirajan is at the scene of the disaster in Uttar Pradesh. And Ambarasan, what's the latest there?