Irish aviation officials are investigating reports of bright lights moving quickly in the skies over Ireland.
The Irish Aviation Authority said Tuesday it was looking into "reports from a small number of aircraft" about what was called "unusual air activity" on Friday.
"The report will be investigated under the normal confidential occurrence investigation process," the authority said in a statement.
Press reports indicate the bright lights were seen Friday morning by pilots from British Airways and Virgin Atlantic.
The airlines did not immediately respond to request for comments.