BAGHDAD/ARBIL - Barack Obama threatened US military strikes in Iraq on Thursday against Sunni Islamist militants who have surged out of the north to menace Baghdad and want to establish their own state in Iraq and Syria.

Iraqi Kurdish forces took advantage of the chaos to take control of the oil hub of Kirkuk as the troops of the Shi'ite-led government abandoned posts, alarming Baghdad's allies both in the West and in neighboring Shi'ite regional power Iran.

"I don't rule out anything because we do have a stake in making sure that these jihadists are not getting a permanent foothold in either Iraq or Syria," President Obama said when asked whether he was contemplating air strikes. Officials later stressed that ground troops would not be sent in, however.

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