The eerie airborne encounter was revealed by website The Drive which obtained the official recordings.

One of the planes was flying at around 37,000ft, when the crew spotted something bizarre above them.

They were travelling east between the Sonoran Desert National Monument and the New Mexico Border in the US on February 24.

Official audio recordings from the FAA of Albuquerque Centre air traffic control revealed how the incident unfolded.

An N71PG Learjet aircraft asked if traffic had passed above them.

The controller replied "negative" meaning there was nothing to his knowledge that would account for such an observation.