Indian Prime Minister Narendra Modi took holy dips in sacred river waters in the northern city of Prayagraj on Wednesday as he joined millions of people at the Maha Kumbh Mela, a week after dozens died in a stampede at the event.

Many were feared dead after millions of Hindu pilgrims at a huge Hindu festival in India rushed to bathe in holy river waters.

After a crowd crush killed dozens of people at the world's largest religious gathering, questions have been raised about security and crowd control at massive events in India.