On Friday morning just before 7am, a British Airways pilot contacted Shannon Air Traffic Control to ask if there were any military exercises taking place in their airspace.
Another pilot also reported a sighting.
She claimed that it did not appear to be on a collision course with the plane but admitted she was still "wondering" what it could be.
The controller replied to the pilot that there were no military exercises taking place, to which the pilot replied: "Okay, it was travelling so fast that you can no longer see it".
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The pilot of a Virgin Airlines Boeing 747 then joined the conversation and made reference to a meteor or another object re-entering the earth's atmosphere. She described it as a "very bright light" that "disappeared at very high speed". He confirmed that there were "multiple objects following the same sort of trajectory" which was all very bright.
Airlive reports that the Irish Aviation Authority is "investigated under the normal confidential occurrence investigation process".
One pilot said the speed was "astronomical, it was like Mach 2" - which is twice the speed of sound.
The first sighting was registered by a British Airways pilot Friday, November 9, at approximately 6:47 a.m. local time, while flying over the southwest coast of Ireland, with the sudden sight leaving him at a loss for words.
These comments come months after several similarly unusual sightings across Ireland purporting to be evidence of UFOs.