The warning does not apply to Pacific oysters, but the Norwegian Food Safety Authority still asks people to be aware of the danger of algae toxins, writes NRK.
The warning against eating the shells applies, among other things, to the entire Oslo Fjord. Agder, as well as parts of Sør-Rogaland, have also received the warning.
On the other hand, you can eat mussels in northern Norway and in large parts of central Norway, according to the mussel forecast.
If you ingest toxic shells, you may experience symptoms such as nausea, abdominal pain and diarrhea.
The Norwegian Food Safety Authority provides advice on mussels every week, from 34 different places along the coast.
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