The CBI, probing alleged irregularities in coal block allocations, Tuesday conducted raids at offices of three companies in Chhattisgarh, officials said.
They said the raids began at around 9.30 a.m. in the towns of Raipur, Raigarh and Janjgir-Champa against companies accused of providing false information to manage allocation of coal blocks.
Sources said offices of the Vandana group were searched in Raipur. Meanwhile, the state's main opposition party, Congress, held a demonstration outside Chief Minister Raman Singh's residence seeking his resignation over the allotment of coal blocks to a Nagpur-based company by the Chhattisgarh Mineral Development Corporation.
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