Police believe a call reporting a bomb at Leigh Sports Village was a hoax.
They were called at 8.50pm on Friday at the end of a match between Manchester United and Southampton's under 23s teams.
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Police went to the stadium, but they established that the call had been a hoax.
A police spokesman said: "Initially when it came in, it was treated as it could have been bona fide, but with further risk assessments and reviews, units clarified that it was thought to be a hoax and everyone was stood down."