Worshippers bathed in water at the Maha Kumbh festival in India.

Footage shows thousands of devotees performing a 'holy dip' at Triveni Sangam in Uttar Pradesh on January 13.

At least 450 million devotees, many of whom have travelled from across the country and various parts of the world, are expected to participate in the festival and perform the sacred ritual 'Shahi Snan' from January 13 to February 26.

The Kumbh Mela is one of the most important religious festivals in Hinduism and the largest human gathering on Earth.

This event will showcase India's rich cultural heritage and spiritual traditions.

Extensive security arrangements have been made by Uttar Pradesh Police to ensure the safety of attendees during the festival.

Senior Superintendent of Police (SSP) Rajesh Diwedi said: 'Today is Paush Purnima, and the security arrangements are in place. All the pilgrims have come here to take a holy dip.

'Additionally, several routes have been prepared for the Sadhus to move towards the ghats and perform rituals.

'We are keeping a watch on everything so that no miscreant can create problems for the devotees,' he added.

Authorities have deployed underwater drones capable of diving up to 328 ft (100 m) across the city to provide round-the-clock surveillance in the Sangam area. Tethered drones, capable of reaching heights up to 394 ft (120 m), have also been deployed, providing aerial views to identify swelling crowds or areas requiring medical or security intervention.

In addition, 2,700 cameras equipped with artificial intelligence (AI) capabilities have been installed for real-time monitoring, and facial recognition technology is being used at entry points. A team of 56 cyber intelligence officers is monitoring online threats, with cyber help desks set up in all police stations across the city.

The intelligence systems have been activated across the Maha Kumbh Mela area, Prayagraj, and neighbouring districts, with multiple checkpoints screening every individual entering the region.

Intelligence squads have also been deployed to monitor suspicious activities and maintain vigilance throughout the area.

The state government has prioritised making this year's Maha Kumbh a 'Digital Maha Kumbh' by employing advanced security measures, including a seven-tier security system spanning from the outer cordon to the inner sanctum.

Police are conducting extensive search operations across Prayagraj and nearby districts, alongside intensive inspections of hotels, restaurants, street vendors, and unauthorised settlements.

The Prayagraj Police Commissionerate's infrastructure includes eight zones, 18 sectors, 13 temporary stations, 44 permanent stations, 33 temporary checkpoints, five companies of PAC, four teams of NDRF, and 12 teams of AS Check.

The Water Police are also equipped with 100 diving kits, 440 lifebuoys, over 3,000 life jackets, and other advanced tools, ensuring comprehensive safety coverage.