The Highland Council is advising members of the public to exercise caution after blue-green algae, also known as cyanobacteria, was identified at Loch Migdale in Sutherland.
The situation is currently under investigation by the Council's Environmental Health team, working in partnership with NHS Highland Public Health Department and other colleagues.
As a precautionary measure, people and pets are being advised to stay away from any visible algal scum present on the loch.
Warning notices will be placed around the loch to advise against contact with the algal scum.
