LISTEN: The exchange between a pilot and Air Traffic Control after drone spotted at Dublin Airport
It caused a lot of disruption.
On Thursday, flights in Dublin Airport were suspended for 30 minutes after there was a report of a drone sighting in the area.
Two flights were diverted to Belfast and one to Shannon during that period and the suspension caused a knock-on delay for many flights throughout the day.
Gardaí have said they are investigating the alleged sighting of a drone around the area at Dublin Airport but no arrests have been made in relation to the incident.
A pilot reported to Air Traffic Control that they'd spotted a drone while they were approaching the airport, who took action by suspending flights and carrying out a search of the area.
You can listen to the conversation between the pilots and the authorities at Dublin Airport below.
Clip via Ultralight Aviation
There were no further sightings of the drone after 30 minutes, so flights resumed shortly after 12pm on Thursday.
Under the Irish Aviation Authority (Small Unmanned Aircraft (Drones) and Rockets) Order, drones are not allowed fly in civil or military controlled airspace or within 5km of an aerodrome or airport unless the aerodrome operator has given permission, and no higher than 400 feet above ground or sea level.