The emergency services have been called to a one-vehicle crash on the A9, just south of Tain.
The main route between Inverness and Thurso has been closed while they deal with the accident.
Police Scotland have advised drivers to expect delays. Traffic is being diverted.
Traffic from Dornoch Bridge heading south can be diverted in Knockbreck Road, Tain. Traffic travelling North can turn into the Inver/Portmahomack junction and can get back out.