Markam was taken to a local medical facility from where he was being shifted to the district hospital when he succumbed to his injuries, he said.
“Rescue teams found Odhe in a seriously injured condition on Thursday late night under the debris and took him to the hospital,” he said.
The rescue operation was called off after the bodies of Kashyap and Kamro were retrieved on Friday morning, he added.
“The condition of Odhe is said to be critical,” said Mrityunjay Pandey, station house officer of Hardi Bazar police station.
SECL’s public relations officer Dr Sanish Chandra said the mine has been closed for the last two years and it had only coal seams, which are found within sedimentary rock formations.
Despite SECL management regularly urging locals not to venture inside the abandoned mine, villagers ignore the instructions and go there to collect coal.
“It is a very unfortunate incident,” he added.