Bhopal, June 5 -- Two workers were killed and seven others injured after a section of the roof collapsed inside an underground coal mine the operated by South Eastern Coalfields Limited (SECL) in Madhya Pradesh's Shahdol district, police said.

The accident occurred around 3.30 am at Bangwar underground coal mine in SECL's Sohagpur area when workers were engaged in constructing a stopping wall, Dhanpuri police station house officer (SHO) Khem Singh Pendro said.

The deceased were identified as Ballu Kol and Golu Baiga. The matter has been handed over to the Directorate General of Mines Safety (DGMS) for investigation, an official said.

Dhanpura police station in-charge Khem Singh said the accident occurred near pillar No. 45, approximate...