Police say at least 30 people were killed and many more injured in a stampede at the world's largest religious gathering as millions of pilgrims rushed to dip in sacred waters during the Maha Kumbh festival in northern India.

At least 30 people have been killed and dozens more injured in crowd crushes at the Maha Kumbh Mela in India, where millions have gathered to bathe at the confluence of sacred rivers.

Hindu devotees and mystics have gathered in the northern Indian city of Prayagraj for the Maha Kumbh festival, which is the largest religious congregation on Earth.

Authorities say that at least 30 people have died and a further 60 were injured in a crowd crush at the massive Kumbh Mela festival in India. The world's biggest religious festival and humanity's largest gathering,

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