Handful of ISIS Militants Remain at Iraq Oil Refinery: Source

BAGHDAD, Iraq -- Al Qaeda-inspired militants have withdrawn most of their forces from Iraq's largest oil refinery, leaving behind a small group of insurgents to battle government forces, a senior Iraqi security official told NBC News on Wednesday.

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The handful of Islamic State of Iraq and al-Sham (ISIS) fighters who remained inside the Beiji complex were exchanging sporadic fire with government forces following a two-day onslaught by troops and helicopter gunships, the official who spoke on condition of anonymity said. The source denied reports that the refinery - which produces about a third of the country's oil - had ever fallen under the control of ISIS.

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- Ben Plesser