KIRKUK - Retreating militants set three wells ablaze at a northern Iraq oil field Thursday as they battled Kurdish forces who launched a major attack nearby, officials said.
The Islamic State (IS) militants set the wells on fire before deserting the Ain Zalah field, which was seized by militants along in early August, an official from the North Oil Company said.
A colonel in the Kurdish peshmerga forces said they had launched a major attack that has seen the militants pushed back from several villages in the area of the oil field.
IS-led militants launched a sweeping offensive in June that overran large areas of Iraq, and turned their sights on Kurdish forces in the north earlier this month, driving them back toward Arbil, the capital of their three-province autonomous region.
That advance, during which the militants targeted minority groups and forced some 200,000 people to flee, sparked a campaign of US air strikes which, combined with international shipments of arms and ammunition, have helped the Kurds claw back some ground.
The militants reportedly rake in significant volumes of cash from the sale of oil from fields they control.
They have made repeated attempts to seize the Baiji oil refinery, which once filled some 50 percent of Iraq's demand for refined petroleum products.
The militant offensive has wreaked havoc on northern production and exports, but Iraq's main southern fields and export terminals have not been affected by the violence.