Chennai:About 12,000 policemen and officers would be deployed for bandobust duty in Chennai city for the 60th Independence Day celebrations on Wednesday, said G. Nanchil Kumaran, Commissioner of Police.As a precautionary measure, all public installations, cinema houses, places of worship, lodges and major commercial establishments would be closely monitored.Vehicle checks had been intensified during nights. Closed-circuit cameras had been installed at specific points, says a press release.