Argentina warned it could “fully exercise all” available actions over plans to develop the Sea Lion oil field near the Falkland Islands, escalating the sovereignty dispute. Buenos Aires said Britain’s Rockhopper and Israel’s Navitas are acting unlawfully and labeled them “clandestine” after the project moved from exploration into development. Argentina cited domestic authorization rules and UN resolutions, while London said decisions for Sea Lion rest with the Falkland Islands government and companies. The first drilling and production timeline could still proceed under current approvals.