BAGHDAD, Dec 22 (Reuters) - A double roadside bomb attack killed one U.S. soldier and wounded 11 in northern Iraq's Kirkuk province, the U.S. military said on Saturday.

The injured soldiers were evacuated to hospital after the attack, which took place on Friday, the military said.

Attacks in Iraq have declined in recent months, but provinces north of Baghdad remain violent. U.S. forces say al Qaeda militants have regrouped in the north after being driven out of other areas