KUALA LUMPUR (Feb 7): Petronas is extending the necessary efforts to ensure the safety of about 155 workers of its contractor on barge to the Yetagun oil rig, located off the coast of Myanmar. Petronas, in a statement here today, reassured it is in close contact with the team and working closely with the contractor in overseeing the well-being of the workers, besides ensuring continuous supply of essentials including food, drinking water and fuel.