The emergency services undertook a night-time search of Loch Ness after reports a balloon-like object had fallen from the sky.
The police, coastguard, lifeboat and an RAF search and rescue helicopter scoured the area but found nothing.
The alarm was raised at 20:00 on Saturday after members of the public said they saw a blue object fall on the south of the Loch, near Dores.
Police thought it might have been a hang glider or microlight.
However, following a three-hour search the emergency services could find "nothing untoward".
Loch Ness RNLI crew member, Vivian Bailey, said: "Speed of arrival on scene was essential and we were able to link our search efforts with those of the Coastguard and RAF, something we practise regularly.
"We believe the reports were based on sightings causing genuine concern and we commend the actions of the members of the public that contacted the emergency services."