* Security forces searching for device since November (Adds comment from U.S. official)
BAGHDAD, Feb 17 Iraq is searching for "highly dangerous" radioactive material stolen last year, according to an environment ministry document and seven security, environmental and provincial officials who fear it could be used as a weapon if acquired by Islamic State.
11:35 As caliphate crumbles, Islamic State lashes out in Iraq15
15:44 Trump administration offers to increase assistance to Iraq: Abadi15
17:50 Over 100 Al Qaeda fighters killed in 'major' US air strike in Syria, defense official says15
13:36 Iraq military: Troops have 'full control' of eastern Mosul12