Two workers were killed and as many injured critically when an underground coal mine collapsed in Umaria district on Saturday late evening.
A senior police officer said there is no confirmation whether more miners are trapped inside the mine.
The collapse was reported around 8 pm in the coal mine operated by the South Eastern Coalfields Limited (SECL) in Pipariya area, 10 km from the Umaria district headquarters.
Heavy vibrations due to drilling work is suspected to have caused the collapse, putting under doubt the safety of miners in underground mines.
Superintendent of Police, Umaria, Chandrashekhar Solanki said the deceased were identified as mining overman Mukesh Tripathi and co-worker Dayaram Rai.
Sohan Kol and Sohan Kumar were rushed to a Jabalpur hospital in critical condition, he added. Sohan Kol is feared to have suffered paralysis down the waist.
The Umaria SP is supervising rescue work at the South Eastern Coalfields Limited (SECL) coal mine.