With terror threat lingering over the city, elaborate security arrangements have been made for smooth conduct immersion of Ganesh idols across the metropolis.

The armed forces would be deployed at strategic locations and 37 watch towers have been set up to monitor the crowd, besides the deployment of policemen at various places to manage the crowd during immersion tomorrow, Joint Police Commissioner (law and order) Himanshu Roy said.

Besides Mumbai police force, Border Security Force and Rapid Action Force will be deployed at different locations. Closed Circuit Televisions have also been installed at different locations to keep watch on crowd and immersion procession and Bomb Detection and Disposal Squads will also be deployed, Roy said.

Over 4000 big Ganesh idols and over 35,000 small household Ganesh idols are expected to be immersed at 105 immersion points on the 11th day of the festival. All routes through which processions take place have been surveyed, Roy said.

Police are regularly in touch with city civic body, fire brigade, Navy, Coast Guard and other authorities for regular updates during the immersion.