Mo Farah was quizzed by US customs on suspicion of being a terrorist, reports the Sun newspaper.
The athlete was taken for questioning after border guards saw he was born in Somalia.
Farah told the Sun: “I couldn’t believe it. Because of my Somali origin I get detained every time I come through US Customs. This time I even got my medals out to show who I am, but they wouldn’t have it.”
More top news
Theresa May has launched her bid to become the next leader of the Conservative Party.
The government is set to announce that David Cameron's successor will make the decision on whether to expand Heathrow or Gatwick.
Michael Gove is to stand for the Conservative Party leadership, saying he does not believe Boris Johnson can "provide the leadership".