The incident took place this afternoon at SV Power Plant in Reki village under Hardibazar police outpost limits, Korba Additional Superintendent of Police Tarkeshwar Patel said.
Hardibazar is located around 40 kms away from Korba town.
The victims were having lunch in a room when fire erupted in turbine house section of the plant. Those who were inside the room inhaled smoke and started having breathing problems, he said, adding, "nobody sustained burn injuries in the blaze."
After getting information, a police team along withfirebrigade personnel rushed to the site, he said.
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It took around two hour to bring situation under control and douse the flames, he said.
Prima facie the rising summer temperature caused explosion in turbine following which its oil spread thereby intensifying the flames. However, the exact cause behind the explosion was yet to be ascertained, Patel said.
A case has been registered and probe was on, he added.
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