**At least 15 workers have been killed and at least 50 are feared trapped after a building collapse in the Indian state of Chhattisgarh, officials say.**Officials say that the accident happened during construction work at a power plant. One report says that a chimney fell on top of the workers.
The accident happened in the town of Korba, 200km (124 miles) from the state capital Raipur.
The plant is being built by Bharat Aluminium Co Ltd (Balco).
Balco is a unit of London Stock Exchange-listed Vedanta Plc, whose business activities are centred on India.
“It’s a massive accident,” Ratanlal Dangi, district superintendent of police, told the Reuters news agency.
“We have launched a rescue and relief operation to save about 50 workers and engineers trapped inside.”