Kaya Callas announced the landing of the European Union's maritime operation forces on board the tanker.
The vessel MV MIDAG is located in the Mediterranean Sea.
According to the head of European diplomacy, the plane apparently belongs to the Russian "shadow fleet".
"During the inspection carried out in accordance with Article 110 of the UN Convention on the Law of the Sea, it was proven that the ship sailed under a false flag," she wrote on the X social network.