The blast was not followed by a fire.
According to Prahova Ambulance Service representatives, the six victims suffered first and second-degree burns and were transported to hospital. Doctors said their condition is good.
Representatives of oil company OMV Petrom, which owns the refinery, said Friday the accident took place during maintenance works on the refinery’s sewer system, which were carried out by an external contractor.
The blast injured the workers of the maintenance service provider, said OMV Petrom.
According to the oil company, the refinery did not halt its activity, as there was no fire hazard.
OMV Petrom has started an investigation to determine if the contractor observed the safety norms stated in the contract with the refinery.