Crews are tackling a wildfire at a tree plantation in Sutherland.
Firefighters were called at about 00:04 on Saturday morning to attend the blaze at Ben Bhraggie close to the Duke of Sutherland monument near Golspie.
Dozens of firefighters battled overnight as the blaze touched the main power lines for the north of Scotland.
On Saturday afternoon, 37 firefighters were at the scene using water bowsers, beaters and knapsack sprayers to try to bring it under control.
Six fire engines, a wildfire unit, a four-wheel drive and an all-terrain vehicle were at the scene.
Police Scotland were working with Scottish Fire and Rescue and said there may be temporary road restrictions.
Balintore Fire Station tweeted pictures of the incident, saying: "A long and challenging shift with the main power lines for the far north of Scotland being engulfed by the smoke and flames.
"Great work by all involved in keeping everyone safe and well."