At least six people were killed and three others injured when explosives kept in a truck went off in a coal mine in West Bengal's Birbhum district on Monday, a police officer said.
Officials in the power department said industrial demand (which accounts for 40 per cent of the state's power consumption) didn't rise last year, contributing to surplus power.
These three blocks figure in the 'Schedule I' list of those coal mines, which are being auctioned afresh