Scores of Shiva devotees poured into the city to collect sacred water from the Ganga as the annual kanwar yatra began on Wednesday.
The ghats of the river, including Har ki Pauri, kept bustling with devotees who streamed in all day to fill their pots and urns with the holy water.
Around 10,000 police and para military personnel, including bomb disposal and anti-terrorist squads, have been deployed along the routes besides installing CCTV and drone cameras on chosen locations in the fair area to maintain a tight vigil, IG (law and order) Ashok Kumar said.