The deceased included a contractor, two miners
Three labourers suffocated on Sunday while they were working in a Chakwal coal mine, police said.
The incident occurred at a coal mine in Choa Saidan Shah tehsil, according to the police.
The deceased included a contractor and two miners. Their bodies were shifted to the Tehsil Headquarters Hospital.
The police said they were investigating the deaths and any negligence on the part of officials.