Gardai and the Irish Coast Guard will resume a search of the Sliabh Liag area of the county tomorrow (Tues).
It follows reports that a person has gone missing in the area.
The area, the setting for Europe’s highest sea cliffs, have been cordoned off all day as a result of the search.
No identity of the missing person has been released by Gardai.
The Irish Coast Guard confirmed it is involved in a search for a missing person.
The Gardai and the Rescue 118 helicopter from Sligo are also involved in the search as are members of the Donegal Mountain Rescue Team.
Gardai have restricted access to the area while the search is ongoing.
In what is believed to be a connected incident, Gardai have also sealed off a house in the Killybegs area of the county.
Forensics officers have entered the house and a search is being conducted.
Uniformed Gardai remain at the scene of the house on the outskirts of the fishing village.
However, Gardai are remaining tight-lipped about the nature of the search.
A spokesperson said they had no further details in relation to this investigation and that when updates are available, they will provide same.
