U.S. forces have prepared a plan to evacuate hundreds of contractors of security companies from Balad air base in Salahuddin province.
Iraqi Military sources said nearly 400 contractors from the two U.S. companies Lockheed Martin Corp. and Sallyport Global are getting ready to leave Balad military base over potential security threats.
The sprawling Balad base was hit by three mortar shells last week.
The official said the evacuation would take about 10 days.