Thousands of dead octopuses have washed up on a beach in northern Portugal. So far, no one has been able to explain what’s happened to them.

According to BBC News the incident is being called “an environmental disaster”, but the truth is that at this stage, we do not know if this is an environmental disaster or not. What we do know is that the dead animals cover a 5-mile stretch of Portugal beach near the city of Vila Nova de Gaia in the Porto District; a district chiefly know for storing and aging the celebrated Port wine.

Portuguese authorities have issued a statement warning the public not to eat the carcasses.

BBC News has posted a video from the scene: