<div dir="ltr">''<div><br />''</div>''<div>The Islamic State has killed two policemen guarding a northern Iraqi oil field, in a first attack on energy facilities since the terror group was driven from the region's towns.</div>''<div><br />''</div>''<div>Security sources said, a large number of IS terrorists attacked a post of the oil police force in the Khabbaz oilfield, killing two and wounding one.</div>''<div><br />''</div>''<div>Iraqi forces announced the total defeat of IS in the country in December after a campaign to oust the group from the territory it seized in 2014.</div></div>