Peter Keisler, an assistant attorney general for the department’s civil division, said: "The Department of Justice remains committed to vigorously pursuing allegations of procurement abuses affecting the military."


Some of the allegations against KBR concerned double-charging and the delivery of "non-conforming products" by suppliers for use in the construction of Camp Bondsteel in Kosovo.


KBR is an engineering, construction and services subsidiary of the Houston-based energy firm Halliburton, which was formerly led by Dick Cheney, the US vice president.


Halliburton and KBR have weathered numerous contracting controversies since Halliburton was awarded a no-bid $2.4 billion contract to supply the US military on the eve of the US-led invasion of Iraq in 2003.