Argentina has said it will file fresh legal complaints against firms exploring for oil near the Falkland Islands as part of President Javier Milei's wider campaign to punish companies operating in the UK-administered territory. Officials have filed a criminal complaint against Navitas Petroleum and launched action targeting Eco Atlantic, while prosecutors are reported to be seeking investigations into other firms. The UK has published guidance defending the islanders' right to develop resources and rejecting Argentine jurisdiction, and analysts warn the moves could escalate tensions with Britain. US President Donald Trump's comments about reconsidering US support for UK sovereignty have added an international dimension.
Argentina Escalates Legal Campaign Against Oil Firms Operating Near Falklands
A cyclist rides past a mural depicting soldiers and a map of the Falkland Islands, known in Argentina as Las Malvinas, commemorating the 1982 war between Britain and Argentina over the islands, in Buenos Aires, Argentina, on September 15, 2026 [Alessia Maccioni/Reuters]
Argentina announced it will lodge fresh legal complaints against companies conducting oil exploration near the Falkland Islands, intensifying Buenos Aires' campaign against businesses active in the UK-administered territory.
New Legal Action and Tougher Sanctions
Government spokesman Adrian Ravier said at a Tuesday press briefing that new cases will be filed against firms operating in the Falklands, though he did not name specific companies. The move accompanies draft legislation this week from President Javier Milei's administration aimed at toughening sanctions on companies involved in exploration around the islands.
Who and Where
The Falkland Islands lie about 600 km (373 miles) east of Argentina's southernmost tip and are administered by the United Kingdom. Earlier this month, President Milei renewed Argentina's long-standing claim to the islands — known in Argentina as Las Malvinas — framing the dispute as a matter of national identity and saying the "winds of change" favour Argentina's position.
Investigations and Specific Targets
Argentine daily Clarín reported a federal prosecutor had requested permission to open probes into executives and shareholders of Israel's Navitas Petroleum and Britain's Rockhopper Exploration. A presidential statement confirmed a criminal complaint has been filed in Argentine courts against Navitas over exploration of the Sea Lion prospect in the North Falkland basin. The government also launched legal action against Canadian explorer Eco Atlantic, which holds a licence adjacent to Sea Lion, saying such licences were granted by the "illegitimate government of the United Kingdom." Federal prosecutor Carlos Stornelli's office did not immediately respond to requests for comment.
Legal Basis and Company Responses
Under a 2011 Argentine law, carrying out exploration on Argentina's continental shelf without national authorisation can attract penalties including up to 20 years' disqualification from operating in Argentina and up to 15 years' imprisonment. Navitas did not immediately respond to requests for comment, and Rockhopper declined to comment. Both companies say their licences are validly issued by the Falkland Islands government and that they do not expect Argentina's actions to derail development.
International Reactions and Risks
Analysts warn the measures could heighten tensions with Britain if Argentina expands its campaign to other parts of the islands' economy. The UK sought to reassure companies doing business in the Falklands, publishing guidance saying it supports legitimate economic activity on the islands and backs the islanders' right to regulate their economy and develop local natural resources.
"The UK government's position is that Argentina has no right to exercise jurisdiction over the Falkland Islands or to apply its domestic law within the Islands, nor towards any companies or individuals participating in business in or connected with the Islands."
The guidance also said the UK sees no legal basis for courts outside Argentina to enforce measures taken against businesses legitimately operating in the Falklands.
Adding to the diplomatic sensitivity, US President Donald Trump told British media this week that he is reassessing US support for British sovereignty over the Falklands and said he would "settle" the dispute between Argentina and the UK, a claim that has raised concerns about wider international implications.
Background: The 1982 conflict over the islands ended after 74 days with Argentina's surrender; the fighting resulted in the deaths of 649 Argentine and 255 British servicemen.
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