Six appliances are currently dealing with a fire stretching across two miles of moorland in Sutherland.
The fire service received the call at 3.54pm and originally sent four pumps to the scene at Kincardine Hill near Ardgay.
Speaking just after 6pm, a spokeswoman for the fire service said: “It looks like a large area of grass just off the A836 between Tain and Bonar Bridge. We have sent another two appliances to the scene.”