Federal prosecutors say two NASA contractors in Florida committed fraud by submitting hundreds of thousands of dollars in fake claims for car tires.

Prosecutors said Wednesday that URS Federal Solutions and its subcontractor, Yang Enterprises Inc., submitted $387,000 in false claims for tire replacements.

The contractors were responsible for overseeing 400 vehicles at the Kennedy Space Center for the General Services Administration.

Prosecutors say the contractors billed NASA for an unprecedented number of tire replacements. They say URS ordered six tire replacements for one vehicle during a period of more than a year and that some of the tires had less than 5,000 miles on them.

Both contractors receive billions of dollars in government contracts.

URS spokesman Ed Mayer called the lawsuit unwarranted and said the company would defend itself.