France says it has seized an oil tanker in the Mediterranean suspected of being part of Russia’s sanction-busting “shadow fleet”.

French President Emmanuel Macron said the tanker, named the Grinch, was “subject to international sanctions and suspected of flying a false flag”.

The French navy, with the assistance of allies including the UK, boarded the vessel on Thursday morning between Spain and Morocco. French maritime authorities said that a search of the vessel had “confirmed the doubts as to the regularity of the flag”.

Russia’s embassy in Paris said it had not been informed of the seizure.