Five dead boar have been found in the bay of Saint-Brieuc, France, bringing the total to 31.
All of the boar were found floating in the water or washed up in the area.
The latest crop included two adults and three piglets.
The nearby beach has been closed for safety reasons after experts said that the boar could have been killed by toxic seaweed.
"We are very worried. How could we be anything other than worried when animals are being found dead?" said the mayor of Morieux, Jean-Pierre Briens.