A radioactive source has been detected in mussel beds off Dalgety Bay beach in Fife.
The discovery in an offshore area came during routine monitoring carried out by the Scottish Environment Protection Agency (Sepa) and Food Standards Scotland (FSS).
Radioactive particles at the beach, first detected in 1990, are thought to date back to instruments from Second World War aircraft dumped at the site.
This is the first time that sources have been found in the mussel beds, Sepa said.
Dr Paul Dale, principal policy officer with the radioactive substances team, said: “This find demonstrates the importance of people following the signs, staying off the demarcated area and not picking up items from the beach.
“We do not believe that at this stage any further actions are required.”
There is already a ban on removing any seafood from the Dalgety Bay area.