The Wiltshire police helicopter was scrambled at midnight last night on reports of materials being stolen from the Spitalcroft building site in Devizes.
The helicopter overflew the area looking for signs of the men who had been reported as throwing materials over the fence.
But nothing registered on the helicopter's thermal imaging camera and the search was called off.
But a police foot patrol did stop two men in the area. They had no stolen goods on them and were released after being told that they would be interviewed again if it was found that anything had been stolen.
Anyone with information is asked to contact Devizes police on 0845 408 7000.
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