Authorities briefly closed the six-lane Festning Tunnel after the incident, but none of the riders were detained.
The tourists apparently got lost after following a GPS route into the tunnel yesterday evening.
The police said they apologized and, escorted them out.
They did not confirm if Lil Nas X was among the party.
However, the rapper posted photographs of the incident on his Instagram story, where he posed with two police officers, joking that he had been let off because they were fans.
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