On June 8, the European Union's member states authorized their warships, operating under Operation IRINI, to detain foreign tankers suspected of transporting Russian oil. EU foreign policy chief Kaja Kallas stated that this action aims to curb Russia's funding for its military operations in Ukraine. The vessels targeted are part of what Brussels refers to as the 'shadow fleet.' Kallas explained that the rules of engagement for Operation IRINI have been updated to allow for boarding of these ships. Initially launched in 2020 to inspect commercial vessels and prevent illegal arms shipments to Libya, Operation IRINI has struggled to meet its objectives. The decision to detain tankers has drawn criticism from Russian officials, who believe it could lead to further escalation and hinder the possibility of restoring normal relations and peace. In response, Russia has intensified protective measures for its vessels, including instructions for shipowners to seek assistance from the Russian Navy and increased monitoring of cargo ships associated with Russia.