The four miners died when they were busy extracting coal in the private coal mine on Tuesday, Superintendent of Police, J F K Marak said, adding the incident was reported to the police very late resulting in delayed retrieval operation.
While three miners were migrant labourers from Assam, the fourth victim was a local. They were identified as Ratna Barman (38), Debokantho Barman (32), Bishwanath Barman (30) and Piterson Marak.
The mine owner Renzi Lama Sherpa has been called for questioning by police.