The Irish Aviation Authority (IAA) is investigating an unidentified flying object (UFO) which streaked across the sky on Friday morning and disappeared.

Several commercial aircraft reported seeing at least one bright light with one pilot stating that the UFO was going at an “astronomical” speed of at least Mach 2 (2,500 km/h), which is twice as fast as a commercial jetliner.

If there are little green men and women visiting Earth for the first time, they have proved to be very elusive.

The British Airways 787, call sign Speedbird 94, radioed Shannon Air Traffic Control at 6.47am asking if there were any military exercises off the west coast of Ireland.

A pilot recounted: “It was moving so fast. It appeared on our left hand side and rapidly veered to the north. We saw a bright light and it then just disappeared at a very high speed.

“We were just wondering. We didn’t think it was likely political. We were just wondering what it might be”, she added.

A Shannon air traffic controller responded: “There’s nothing showing on either primary or secondary (radar)”.

A pilot from a Virgin Airlines plane, callsign Virgin76, came on to air traffic control and suggested it might be a “meteor or another object making some kind of re-entry. There appeared to be multiple objects following the same sort of trajectory. They were very bright from where we were.”

The pilot also confirmed that he he had seen “two bright lights that seemed to bank over to the right and climb away at speed at least from our perspective.”

A third pilot responded: “Glad it wasn’t just me”.

An IAA spokesman said the authority is investigating the incident and will file a report. “This report will be investigated under the normal confidential occurrance investigation process.” The spokesman added that it was unlikely to be aliens from another planet.