QUETTA - Four miners suffocated to death in Dukki coalfield of Loralai district on Friday. As per reports reaching here, four miners were busy in extracting coal from a mine in Dukki when it filled with poisonous gas because of improper ventilation in the coalmine. As a result, all four miners identified as Wazir Khan, Palwan, Bari Dad and Shahzad fell unconscious and died. The bodies of the victims were retrieved from the coalmine by the local authorities and were handed over to their heirs. The victims belonged to Qamar Uddin Karez area of Zhob District.