Police in Sutherland are appealing for information after several incidents where roofing tacks have been found scattered on a road near Bettyhill.
Tacks have been found at the junction of the A836 between Bettyhill and Strathy with the unclassified Kirtomy road on various occasions during the last eight months.
This was first reported in February of this year and twice more in April and May.
The most recent incident reported to police happened within the last week.
The incidents have occurred predominantly late in the evening.
Constable Katy Hunter said: “Deliberately leaving tacks on the road is clearly and irresponsible act which creates a hazard for all road users.
“I would ask anyone who has ever seen an unusual activity in the area over the last few months to pass this on to us, even if it seemed of little note at the time.
“I am particularly interested to see any dash-cam footage of vehicles or persons in the area late in the evening.
“You can pass on information by calling 101, quoting reference NE6040/18, or call Crimestoppers on 0800 555 111.”