Immersion of Durga idols will continue on all days from today, including on Muharram day tomorrow till October 3.
Apart from manning the riverfront and preventing onlookers from getting too close to the water, senior officers Kolkata Police will be conducting special vigil from watch towers constructed near the ghats.
"We are keeping strict vigil at the ghats. Also there will be several police personnel posted on the way to them to check any untoward incident during the immersion process. We are not taking any chance," a senior Kolkata Police officer told PTI.
"Besides, closed-circuit television cameras and drones will also be used at certain ghats too to keep a tab on the immersion process there. Our officers will also be there in plain clothes," he said.
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The administration has put up additional lights at the ghats and cranes have been employed to bring out the remains of idols, flowers from the river water to avoid pollution.
Around 3500 community pujas were held in the city this year, while over thousands more are observed in the suburban towns and villages across West Bengal.
The high court had also directed the West Bengal government to make necessary security arrangements in this connection.
The state government had earlier imposed restrictions on Durga idol immersion on September 30 after 10 pm and had disallowed it on October one.