France has launched an investigation into a Russian-linked oil tanker anchored off Saint-Nazaire on the Atlantic coast. The vessel is suspected of being part of Moscow's "shadow fleet" and has also been mentioned in Denmark's inquiry into mysterious drone flights that disrupted air traffic last month. The 244-meter tanker, named Boracay but also known as Pushpa and Kiwala, has been anchored near French territorial waters off the Saint-Nazaire wind farm for several days, News.Az reports citing foreign media. It sails under a Benin flag and left the Russian port of Primorsk, near Saint Petersburg, on 20 September. The Brest prosecutor’s office said it opened the investigation after a report from the navy.