In a surprise move that has rattled the power corridors of Tamil Nadu, Income Tax officials raided  state chief secretary P Rama Mohana Rao's residence in Chennai in the wee hours of Wednesday. At the time of posting this report, IT officials were said to have been carrying out the search and seizure operations. Sources said searches were proceeding at 10 places, including at premises of State Environment Impact Assessment Authority officials who were involved in clearing sand mining permissions. Official sources were not available to clarify the rumours that the inspection today is part of the ongoing investigation into Shekhar Reddy, an influential sand miner who was caught with over Rs 130 crore of undisclosed money including mint fresh Rs 2,000 notes, and 171 gold bars. The CBI and ED have registered cases against Reddy and his two accomplices.