The Government Accountability Office has denied a protest by U.S. Aerospace Inc. (USAE) over the rejection by the Defense Department of the California company's bid to build refueling tankers for the U.S. military, CNBC reports Wednesday.

The ruling leaves rivals Boeing Co. (BA) and European Aeronautic Defence & Space Co. (EAD.FR) as the remaining bidders for the $35 billion contract for 179 refueling planes.

U.S. Aerospace, which proposed building the tankers with Ukraine's state-owned Antonov Aeronautical Scientific/Technical Complex, has said the Pentagon refused to accept the proposal due to the timing of its delivery.

The GAO, the investigative arm of Congress, told CNBC on Wednesday that it would have a statement about the protest shortly. A decision on the awarding of the tanker contract could come as early as next month, the cable channel reports.

Full story at: www.cnbc.com

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