Mahalingam a Chennai native went out for a jogging on Monday, but did not return home. His wife Vinayaka Sundari has lodged a police complaint. He had left behind his wallet.
The Mallapur police said investigation is on in the case and a search is undertaken. They are also not ruling out the possibility of a kidnap. His wife said that there were no police records of threat perception to Mahalingam.
Reports suggest that Mahalingam, who was a senior scientist with Kaiga Atomic Energy station had access to the nuclear plant and to the sensitive data.