The blast took place after an encounter between the security personnel and Maoists at Daimari area in East Singhbhum district in the course of an operation to flush out extremists, DIG (Kolhan) Navin Kumar Singh said.
Police said that the blast occurred when security personnel, including district police, were scaling nearby hills after the encounter. The constable killed was the body guard of the Deputy Superintendent of Police, Ghatsila, the police said.
Additional forces have been rushed to the spot and a massive search operation was launched in the Maoist-affected area, which borders west Midnapore of West Bengal.
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