Insurgents bombed two oil wells at Kirkuk’s Bai Hassan field and killed at least one guard on Wednesday — the latest sign that energy infrastructure remains vulnerable as the self-proclaimed Islamic State (IS) militant group increases the tempo and intensity of its attacks around northern Iraq. In a dawn raid, militants attacked a guard post and detonated IEDs on wells number 177 and 183, according to an Oil Ministry statement, a Kirkuk security official, and an official with the state-run North Oil Company (NOC), which operates the field. One fire has already been put out, the NOC official said, and the field’s recent production level of about 70,000 barrels per day (bpd) has not been affected.