Authorities working to contain threat to Corsican waters (file image/pixabay)
Six hundred metric tonnes of bunker were split into the sea from at least one pierced fuel tank when a two cargo ships collided north of the French island of Corsica.
A French government minister who was visiting the collision site gave the figure which was reported by regional news provider the Local.
To mitigate the effects of the spill, French and Italian anti-pollution teams have been deployed.
So far, the oil slick, which has stretched to 12 miles' long, has stayed outside of Corsica's Cap Corse marine park, according to the report.