The civilian at the centre of the allegations, a graduate student in his thirties identified only by his surname Oh, claims he flew drones into North Korea three times since September last year.
At a cabinet meeting, Lee expressed concern over whether the latest drone flights were connected to that episode.
“It is questionable how civilians could even imagine sending drones at a time when such a trial is under way,” he said, noting there were “allegations that a state agency was involved”.
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