Hindu devotees have sacred marks reading 'Radhe' on their foreheads at the confluence of the Ganges, the Yamuna, and the Saraswati rivers during the 45-day-long Maha Kumbh festival in Prayagraj, India, Tuesday, Jan. 14, 2025. Credit: AP/Ashwini Bhatia

The Hindu festival that turned deadly in northern India on Wednesday is a religious gathering with deep spiritual meaning for devotees who come by the millions to take a cleansing dip in waters they consider sacred.

Officials had been preparing for months for the world’s largest religious festival, with around 400 million Hindu pilgrims expected to take part