By and large, the processions and immersions went off peacefully with no untoward incident reported so far, police spokesperson and DCP Dhananjay Kulkarni said.
In the backdrop of terror outfit Al-Qaida announcing a new South Asian wing, police had made extensive arrangements to secure the financial capital, where the Ganesh festival is celebrated at a mega scale.
Devotees in large numbers were seen lined up on both sides of the roads and also on buildings to take a glimpse of Ganesh idols during the immersion processions amidst a riot of colours, traditional dance and music.
Movement of open trucks and large vehicles carrying huge idols amid a sea of people seeking divine blessing along the procession routes virtually brought the bustling city to a grinding halt.
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As the idols waded through thousands of people, dancing devotees raised chants of 'Ganpati Bappa Moriya Pudhchya Varshi Lavkar Yaa' (Lord Ganesh return soon next year) amid the beating of drums.
At Juhu beach, three persons suffered wounds in their feet after being stung by jellyfish that had assembled in the shallow waters off the coast. They were taken to the nearby Cooper Hospital, police said.
The Lal Baug Raja, the most popular Ganesh idol in the city, drew millions of devotees, who travelled miles along with the giant idol even as erratic rains failed to dampen the festive spirit.