A UK investigator says radio interference may have been behind a drone's strange behaviour in the south of the Island.
The Air Accident Investigation Branch carried out a record-only investigation of an incident, which happened on Tuesday, November 26 last year.
A drone near Earystane sounded a proximity alert before its data link was lost and it flew out of sight of its pilot and a safety spotter.
It was set to return home automatically but failed to do so: the AAIB says a nearby telecommunication tower may have caused signal interference.
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