The Uttar Pradesh government has ordered a judicial probe into the deaths of at least 30 people in stampedes at India’s Kumbh Mela festival, where millions of Hindu devotees gathered for a ritual bath at the confluence of three sacred rivers.

A senior police officer said at least 30 people died as a crowd panicked at the Hindu Kumbh Mela mega-festival in the northern city of Prayagraj.

The Kumbh Mela happens every 12 years at Sangam, the confluence of three sacred rivers - the Ganges (Ganga), Yamuna and the mythical Saraswati. Hindus believe that bathing in the sacred waters will cleanse them of sins and help them attain salvation.