An EU naval mission led by Italy boarded a tanker linked to Russia’s so-called shadow fleet on Sunday, according to the report. The move marks the second such operation in less than two weeks, signaling a sharper European focus on vessels accused of helping Russia keep oil exports moving despite restrictions.

The term shadow fleet is widely used for tankers operating through opaque ownership structures and other methods that can make cargo movements harder to track. European authorities have increased scrutiny of these ships as they try to enforce sanctions and limit workarounds tied to Russia’s energy trade.

This latest boarding suggests the EU is prepared to take more direct action at sea when it believes a vessel may be connected to sanctioned activity. With Italy leading the naval mission, the operation also highlights the role of member states in carrying out enforcement efforts under a broader European framework.

The development comes as Europe continues to tighten oversight of maritime traffic linked to Russian exports. A second boarding in such a short period points to a more active phase in monitoring and challenging the network of tankers described by officials as part of Russia’s shadow fleet.