New Delhi, Sept. 28 -- Accessing the building's terrace without arousing suspicion, entering the store through a specific weak point, disarming the surveillance system, boring a hole in the only concrete wall of the strong room and evading most CCTV cameras in the packed market - every step burglars took during an audacious heist on a jewellery store in Jangpura was planned meticulously and executed with clockwork precision, pointing to an insider's role in the theft, said police officers investigating the elaborate crime.

Investigators made little headway in identifying the suspects a day after the Rs.20 crore burglary came to light, but trained their focus on the showroom's employees, past and present, as well as service-providers who ...