The U.K. defense ministry is placing a $5 million order with Lockheed Martin Corp. for additional unmanned surveillance aircraft.
The company said Tuesday that the order covered Desert Hawk III aircraft. U.K. troops have been using the Desert Hawk vehicles in Afghanistan.
The company said new, 8-pound models of the system come with better target-position information and image stability.
The additional vehicles are scheduled to be delivered by this fall.
Shares of Lockheed Martin, based in Bethesda, Md., fell 59 cents to $71.89 in morning trading Tuesday as major market indicators were down by more than 1 percent.